12-Letter Words Starting with M
There are 270 twelve-letter words that start with M on Word.ws, from macrobiotics to mythological. The most common are manufacturer, metropolitan, manufactured, mathematical and manipulation.
Meanings from Wiktionary. Not an official Scrabble, Words With Friends or Wordle word list.
All 270 twelve-letter words that start with M
MA
- macrobiotics20n. The art or science of prolonging life, of living a long life.
- macrocephaly26n. A condition in which the head is abnormally large.
- macroeconomy23n. A large-scale economy.
- macronucleus18n. The larger of the two nuclei present in ciliate protozoans; it controls...
- mademoiselle17n. A courtesy title for an unmarried woman in France or a French-speaking...
- magistrature15n. Magistracy.
- magnetically20adv. Using magnetism.
- magnetizable26adj. Able to be magnetized.
- magnetometer17n. An instrument used to measure the intensity and direction of a magnetic...
- magnetometry20n. The measurement of magnetic fields (strength and direction etc).
- magnetopause17n. The boundary between the Earth's magnetosphere and the sun's plasma.
- magnificence22n. Grandeur, brilliance, lavishness or splendor.
- maintainable16adj. Able to be maintained.
- majestically26adv. In a majestic manner.
- majoritarian21adj. Supporting the dominance of the majority over the minority.
- malalignment17n. Bad or wrong alignment; misalignment.
- malcontented17adj. Synonym of malcontent.
- malevolently20adv. In a malevolent manner; evilly.
- malformation19n. An abnormal formation.
- malleability19n. The quality or state of being malleable.
- malnourished18adj. Suffering from malnutrition.
- malnutrition14n. A lack of adequate nourishment.
- malocclusion18n. A misalignment of the upper and lower sets of teeth.
- maltodextrin22n. A type of dextrin commonly used as a food additive.
- maltreatment16n. Cruel or harmful treatment or abuse; mistreatment.
- malversation17n. Corrupt behaviour, illegitimate activity, especially by someone in...
- malvertising18n. Internet advertising whose real intention is to deliver malware to the...
- mammographic26adj. Of, or pertaining to, mammography.
- maneuverable19adj. Able to be maneuvered.
- manipulation16n. The practice of manipulating or the state of being manipulated.
- manipulative19adj. Using manipulation purposefully.
- manslaughter18n. The unlawful killing of a human, either in negligence or incidentally...
- manufactured20adj. Manmade; produced by humans rather than nature.
- manufacturer19n. A person or company that manufactures.
- marginalized25adj. Subject to marginalization.
- marketeering19n. Marketing, especially when designed to mislead; false advertising.
- marksmanship25n. The ability to shoot accurately at a target.
- marriageable17adj. Suitable for marriage.
- marshmallowy25adj. Resembling or characteristic of a marshmallow.
- marvellously20adv. In a marvellous manner.
- masquerading25n. The act of one who masquerades.
- masterstroke18n. An action which demonstrates great skill or artistry.
- mastocytosis19n. A disorder caused by an overabundance of mastocytes in the body.
- materialized24adj. Having taken physical form; having become real.
- mathematical21adj. Of, or relating to mathematics.
- maturational14adj. Of, pertaining to, or promoting maturation.
- maximization32n. The act of raising something to its greatest value or extent.
ME
- meaningfully21adv. In a meaningful or significant manner.
- mecamylamine23n. A norbornane derivative which is a ganglionic nicotinic blocking agent...
- mechanically24adv. From a mechanical point of view.
- mechatronics21n. The synergistic combination of mechanical engineering, electronic...
- mediolateral15adj. Of or pertaining to both the medial plane and the side.
- meditational15adj. Of, or pertaining to, meditation.
- meditatively21adv. In a meditative manner.
- meetinghouse18n. A building where people meet for a purpose.
- megalomaniac19n. One affected with or exhibiting megalomania.
- megalosaurus15n. A theropod dinosaur of the genus Megalosaurus.
- melanocortin16n. Any of a group of pituitary peptide hormones.
- melanogaster15n. Any of several fungi of the genus Melanogaster.
- melodramatic19adj. Of or pertaining to melodrama; like or suitable to a melodrama...
- memorability21n. The quality or state of being memorable.
- memorization25n. The act of committing something to memory or memorizing.
- meniscectomy23n. Removal of the meniscus (cartilage) of a joint (especially of the knee).
- menstruation14n. The periodic discharging of the menses, the flow of blood and cells...
- mercantilism18n. The theory that a nation must always have a positive balance of trade...
- mercantilist16adj. Of, pertaining to, or believing in mercantilism.
- merchandiser20n. A trader, seller or merchant, especially in the retail trade.
- merchantable21adj. Fit for the market, i.e. suitable for selling for an ordinary price....
- mereological17adj. Of or pertaining to mereology, a collection of axiomatic first-order...
- meretricious16adj. Tastelessly gaudy; superficially attractive but having in reality no...
- meristematic18adj. Of or pertaining to the meristem.
- meritocratic18adj. Pertaining to a meritocracy.
- merrythought24n. The wishbone or furcula.
- mesothelioma19n. An uncommon malignant tumour of the mesothelium, usually of the lungs...
- metabolizing26adj. That serves to metabolize a specific class of compound.
- metabolomics20n. The study of the range of metabolites present in a person's body at...
- metabotropic20adj. Describing a neurotransmitter or cell receptor whose action is mediated...
- metagenomics19n. The study of genomes recovered from environmental samples; especially...
- metalanguage16n. Any language or vocabulary of terms used to describe or analyze a...
- metallurgist15n. A person who works in metal (the type of material).
- metalorganic17adj. Organometallic.
- metalworking22n. The art and craft of shaping metal.
- metamaterial16n. Any material engineered to have a property that is rarely observed in...
- metamorphism23n. The process by which rocks are changed into other forms by the...
- metamorphose21v. Of a moth or insect, to undergo metamorphosis.
- metaphorical21adj. Pertaining to or characterized by a metaphor; figurative; symbolic.
- metaphysical24adj. Of or pertaining to metaphysics.
- metasomatism18n. The process by which the bulk chemical composition of a rock is changed...
- metavolcanic21adj. Being or relating to a type of metamorphic rock originally produced by...
- methacholine22n. A choline derivative with parasympathomimetic activity that can induce...
- methacrylate22n. Any salt or ester of methacrylic acid, especially an ester used in the...
- methanethiol20n. A colourless gas, a thiol with a smell like rotten cabbage, found...
- methanogenic20adj. Of or relating to a methanogen or to methanogenesis.
- methaqualone26n. A sedative drug that has effects similar to barbiturates, also used...
- methodically23adv. In a methodical manner; with order.
- methotrexate24n. An antimetabolite and antifolate drug used in treatment of cancer...
- methoxychlor32n. A synthetic organochlorine used as an insecticide.
- meticulously19adv. In a meticulous manner.
- metrological17adj. Of or pertaining to metrology.
- metropolitan16n. A bishop empowered to oversee other bishops; an archbishop.
- metrosideros15n. Any of the genus Metrosideros of myrtaceous trees and shrubs, including...
MI
- microbalance20n. Any balance capable of weighing objects having a mass less than a...
- microbicidal21adj. Of, pertaining to, or functioning as a microbicide.
- microbiology22n. The branch of biology that deals with microorganisms, especially their...
- microblading20n. A semipermanent cosmetic procedure for the eyebrows, depositing...
- microbrewery24n. A small commercial brewery, often one serving a single pub at which it...
- microcapsule20n. A very small capsule designed to release its contents when broken...
- microcephaly26n. A neurological disorder in which the person affected has an abnormally...
- microchannel21n. A television channel targeted at a small but specific audience.
- microcircuit20n. An electronic device, usually fabricated by photolithography, that is...
- microclimate20n. A small, local region having a unique pattern of weather or weather...
- microcurrent18n. An electric current with a very low amperage.
- microfiction21n. Fiction that has a significantly shorter than average length.
- microfinance21n. Finance that is provided to unemployed or low-income people or groups.
- microfluidic22adj. Of, pertaining to, or using microfluidics or a microfluid.
- micrognathia20n. Micrognathism.
- micrographia22n. The condition of having small handwriting, sometimes a symptom of...
- micrographic24adj. Pertaining to micrographics.
- microgravity23n. A state of very low acceleration between two free floating objects, as...
- microhabitat21n. A specific habitat, typically extremely small, such as a cave corner or...
- microlending18n. Lending of small amounts of money per loan as part of a microcredit...
- microlensing17n. Gravitational lensing.
- micromanager19n. One who micromanages.
- micronucleus18n. A small nucleus.
- micropayment23n. A financial transaction for a very small amount of money.
- microphonics23n. The phenomenon where certain components in electronic devices transform...
- microphysics26n. The branch of physics that deals with objects smaller than a molecule.
- micropipette20n. A very small pipette.
- microplastic20n. Small particles of plastic (typically less than 5 mm) produced by the...
- micropolitan18adj. Of or pertaining to a city or twin cities having at least 10,000 but...
- microprogram21n. A set of microinstructions in a CPU, used to implement machine...
- microscopist20n. An expert at microscopy.
- microseismic20adj. Describing any small seismic event that causes little or no damage or...
- microservice21n. A small independent process that communicates with other processes...
- microstation16n. A small networked computer with limited capabilities.
- microsurgery20adj. Relating to techniques of surgery on very small or delicate parts of...
- microturbine18n. A small turbine, usually a gas turbine.
- microwavable24adj. Suitable for heating in a microwave oven; said of food and non-food...
- midafternoon18n. The middle of the afternoon, normally between 2 and 4 pm.
- midcontinent17adj. In or near the middle of a continent.
- middleweight23n. A weight class in professional boxing between light middleweight or...
- mifepristone19n. A steroid medication that inhibits the action of progesterone...
- militaristic16adj. Using the power of the military.
- mindlessness15n. The property of being mindless.
- mineralizing24adj. That mineralizes.
- mineralogist15n. An expert in mineralogy.
- minesweeping20n. The detection and safe disposal of mines.
- miniaturised15adj. That is a miniature version of something.
- miniaturized24adj. That is a miniature version of something.
- minicomputer20n. A computer smaller than a mainframe, but larger than a microcomputer.
- minification19n. The reduction in apparent size of objects viewed through a lens or...
- minimalistic18adj. Exhibiting or relating to minimalism.
- minimization25n. The act of lowering something to its smallest value or extent.
- ministership19n. The position held by a minister.
- ministration14n. The act of ministering; an instance of providing aid, care, or...
- miraculously19adv. In a miraculous manner.
- misadventure18n. Synonym of misfortune, bad luck or mishap, an instance of bad luck.
- misalignment17n. The state, or an instance, of being misaligned.
- misanthropic21adj. Having a negative view of mankind. This may express itself as, e.g....
- misapprehend22v. To interpret incorrectly; to misunderstand.
- misattribute16v. To erroneously attribute; to falsely ascribe; used especially of...
- miscalculate18v. To calculate incorrectly.
- misconceived22adj. Badly or wrongly conceived.
- misconstrued17adj. Interpreted erroneously, understood incorrectly; misunderstood.
- misdiagnosis16n. An incorrect diagnosis.
- misdirection17n. An act of misleading, of convincing someone to concentrate in an...
- miseducation17n. The act or process of miseducating; incorrect education.
- misericordia17n. A misericord, a thin-bladed dagger, used in the Middle Ages to give the...
- misfortunate17adj. Having suffered misfortune; pitiable or habitually unfortunate.
- misgendering17n. The act of referring to somebody by the wrong gender.
- misinterpret16v. To make an incorrect interpretation; to misunderstand.
- mislabelling17n. An incorrect labelling.
- misleadingly19adv. In a misleading manner.
- misogynistic20adj. Of, relating to, or exhibiting misogyny.
- misplacement20n. Bad placement.
- mispronounce18v. To pronounce (a word, phrase, etc.) incorrectly.
- misquotation23n. An incorrect quotation.
- misreporting17n. Incorrect reporting.
- misrepresent16v. To represent falsely; to inaccurately portray something.
- misstatement16n. Something stated wrongly; a (usually unintentionally) incorrect...
- mistreatment16n. Cruel, abusive, unfair, or thoughtless treatment of a person or animal...
- mitochondria20n. Mitochondrion.
- mitoxantrone21n. A particular drug used in chemotherapy.
MO
- mobilisation16n. The act of mobilising.
- mobilization25n. The act of mobilizing.
- mockumentary25n. A film or television programme presented as if it were a documentary...
- modification20n. The change undergone by a word when used in a construction.
- moisturizing24n. The act of making something moist; especially, of a cosmetic, making...
- monadelphous20adj. Having all its stamens within a flower fused together at least partly...
- monetization23n. The conversion of something (especially metal) into money.
- moneylending19n. The practice of lending money.
- monocultural16adj. Having only one (single) culture; of or relating to a monoculture (of...
- monodisperse17adj. Having particles of (approximately) the same size.
- monofilament19n. A single strand of man-made fiber.
- monogamously20adv. In a monogamous manner.
- monomaniacal18adj. Of or relating to a monomaniac.
- monomorphism23n. An injective homomorphism.
- monophyletic24adj. Of, pertaining to, or affecting a single phylum (or other taxon) of...
- monopolistic18adj. Acting in the manner of a monopoly.
- monospecific23adj. Containing only one known species.
- monostearate14n. Any compound containing a single stearate ester or ion.
- monosyllabic21adj. Consisting of one syllable.
- monosyllable19n. A word of one syllable.
- monotheistic19adj. Believing in a single god, deity, spirit, etc., especially for an...
- monotonicity19n. The state of being monotonic.
- monotonously17adv. In a manner that is tedious, repetitious or lacking in variety.
- monumentally19adv. To a monumental extent; very greatly.
- moonlighting19n. The act of, or a period of, working on the side (at a secondary job)...
- moralization23n. The act of moralizing.
- morcellation16n. The breaking into small pieces prior to removal.
- morphometric23adj. Of or pertaining to morphometrics.
- morphosyntax29n. The system of the internal structure of words (morphology) and the way...
- mosquitofish29n. Any of several small fish that feed on mosquitoes, but especially those...
- motionlessly17adv. In a motionless manner; without moving.
- motivational17adj. Tending or intended to motivate.
- motorboating17n. The act of travelling in a motorboat.
- motorcycling22n. The activity or hobby of travelling on a motorcycle.
- motorcyclist21n. Someone who rides a motorcycle.
- motorization23n. The act of motorizing something.
- mountainside15n. The sloping side of a mountain.
- moustachioed20adj. Possessing a moustache or moustachio.
- moxifloxacin33n. A particular fluoroquinolone antibiotic.
MU
- mucilaginous17adj. Of or pertaining to mucilage; of, pertaining to, or resembling mucus...
- mucormycosis23n. Any fungal infection caused by fungi in the order Mucorales.
- mulligatawny21n. An Indian soup having a meat base and curry seasoning.
- multibillion16adj. Having a value of several billion (in general, at least two billion).
- multicarrier16adj. Describing a telecommunications signal that is split into fragments...
- multicasting17n. The simultaneous transmission of data to several destinations on a...
- multicentric18adj. That occurs in multiple centres at the same time.
- multichannel19adj. That uses multiple channels to process, receive, or transmit signals.
- multicolored17adj. Having multiple colors.
- multiculture16n. A culture made up of many heterogeneous elements; a multicultural...
- multidecadal18adj. Involving multiple decades.
- multifaceted20adj. Having multiple facets or (geometric) faces.
- multifarious17adj. Having great diversity or variety; of various kinds; made up of many...
- multiferroic19adj. Having multiple ferroic properties (e.g. both ferroelectric and...
- multifractal19adj. Describing a system that is fractal in multiple ways.
- multilateral14adj. Having many physical sides.
- multilayered18adj. Having more than one layer.
- multilingual15adj. Of, relating to, or involving multiple languages.
- multimillion16adj. Having several millions; costing or worth many millions of dollars...
- multinodular15adj. Having multiple nodules.
- multinuclear16adj. Having multiple nuclei; multinucleate.
- multipartite16adj. Divided into multiple parts.
- multiphysics24n. The simultaneous use of multiple physical models or techniques.
- multiplexing24n. The simultaneous transmission of multiple signals on the same channel.
- multiplicand19n. A number that is to be multiplied by another (the multiplier).
- multiplicity21n. The state of being made of multiple diverse elements.
- multipronged18adj. Having multiple prongs.
- multiprotein16adj. Consisting of several proteins.
- multipurpose18adj. Designed or intended to fit more than one type of function or...
- multisensory17adj. Pertaining to the integration of information from different sensory...
- multiservice19adj. Pertaining to or offering more than one type of service.
- multispecies18adj. Comprising or involving more than one species.
- multistoried15adj. Multi-storey.
- multitasking19n. The simultaneous execution of multiple tasks (programs) under the...
- multivariate17adj. Having, involving, or relating to multiple variables.
- multiversity20n. A kind of modern, large-scale university, open to all, proposed by...
- multivitamin19n. A mixture of vitamins.
- municipality21n. A district with a government that typically encloses no other governed...
- munificently22adv. In a munificent manner.
- museological17adj. Pertaining to museology.
- musicianship21n. The skill of a musician or of a composer.
- musicologist17n. One who studies musicology.
- mutagenicity20n. The condition of being mutagenic.
- muzzleloader33n. A variety of firearm in which the weapon is loaded from the end that...
MY
- mycophenolic26adj. Of or pertaining to mycophenolic acid or its derivatives.
- myofibrillar22adj. Of or pertaining to myofibrils.
- mysteriously20adv. In a mysterious manner.
- mythological23adj. Of, or relating to myths or mythology.
2,629 rare twelve-letter words that start with M
- macaberesque
- macaronicism
- macaronistic
- macaroonlike
- macdonaldite
- macfarlanite
- machaeridian
- machairodont
- macharomancy
- machicolated
- machinimator
- machinoclast
- machtpolitik
- mackerelling
- mackintoshed
- macluravirus
- macplocimine
- macroadenoma
- macroamylase
- macroanalyst
- macroanatomy
- macrobenthic
- macrobenthos
- macrobicycle
- macrobiology
- macrobrewery
- macrocapsule
- macrocarrier
- macrochamber
- macrochannel
- macrocheilia
- macrociliary
- macrocircuit
- macroclimate
- macrocluster
- macrocomplex
- macrocontext
- macrocontrol
- macrocracked
- macrocrystal
- macroculture
- macrocurrent
- macrocytosis
- macrocytotic
- macrodactyly
- macrodeposit
- macrodiolide
- macrodomatic
- macrodontism
- macrodroplet
- macrodynamic
- macroecofact
- macroecology
- macroelement
- macroembolus
- macrofeature
- macrofibrous
- macrofilaria
- macrofluidic
- macrofoulant
- macrofouling
- macrogenesis
- macrogenomic
- macrogeology
- macrogliosis
- macroglossia
- macroglossic
- macrognathia
- macrognathic
- macrographic
- macrograzing
- macrohabitat
- macrohistone
- macrohistory
- macroimaging
- macroinfarct
- macroinfauna
- macroinsular
- macrokinesis
- macrokinetic
- macrolactone
- macrolensing
- macrological
- macromeander
- macromeritic
- macromineral
- macromonomer
- macronodular
- macronuclear
- macropattern
- macrophagous
- macrophallic
- macrophallus
- macrophiliac
- macrophysics
- macropipette
- macroplastic
- macropleural
- macropolymer
- macroposthia
- macroposthic
- macroproblem
- macroprocess
- macroproject
- macroprosody
- macroprotein
- macropterous
- macropyramid
- macroradical
- macrorealism
- macrorealist
- macroreality
- macroreentry
- macroremains
- macroroutine
- macrorupture
- macrosaccade
- macroscopics
- macroseeding
- macroseepage
- macrosegment
- macroseismic
- macrosession
- macrosiphine
- macrospatial
- macrospecies
- macrospicule
- macrospinous
- macrostylous
- macrosurgery
- macrosynteny
- macrotextual
- macrotexture
- macrotheline
- macrothermal
- macrothermic
- macrovacuole
- macrovesicle
- macroweather
- maculatoside
- maculiferous
- maculopapule
- maderization
- madreporitic
- madrigaletto
- maduropeptin
- maestropiece
- magazination
- magazineland
- magazineless
- magazinelike
- magenstrasse
- magicianlike
- magicianship
- magirologist
- magistrality
- magistrative
- magistricide
- magmagenesis
- magmatically
- magnelectric
- magneticness
- magnetochron
- magnetodrome
- magnetofluid
- magnetograph
- magnetogyric
- magnetoionic
- magnetologic
- magnetomotor
- magnetooptic
- magnetophone
- magnetoroton
- magnetorquer
- magnetoscope
- magnetoscopy
- magnetoshear
- magnetosomal
- magnetosonic
- magnetotaxis
- magnetotrion
- magnetricity
- magnicaudate
- magnifically
- magniloquent
- magniloquous
- magnitudinal
- magnoflorine
- magnoliopsid
- magnotherapy
- magnussonite
- mahoganyware
- maidenliness
- maidlessness
- maieutically
- mainmortable
- mainpernable
- mainstreamer
- maintainment
- majesticness
- majolicaware
- majoranolide
- majoritarily
- majoritively
- majorityhood
- majorization
- makaluvamine
- makovickyite
- makurakotoba
- malabaricane
- malabaricone
- malacofaunal
- malacologist
- malacosteine
- maladaptable
- maladherence
- maladjustive
- maladventure
- malagrugrous
- malakoplakia
- malakoplakic
- malapertness
- malapterurid
- malarialized
- malarigenous
- malariogenic
- malayophobic
- malconceived
- malcondition
- malcontently
- maldescended
- maldeveloped
- maldigestion
- maldigestive
- maldirection
- maleducation
- maleducative
- malefactress
- maleficently
- malelessness
- malexecution
- malformative
- malformatted
- malinfluence
- malinowskite
- malintention
- malleableize
- malleobactin
- mallestigite
- mallophagous
- malnormality
- malodorously
- malonylation
- maloperation
- malorganized
- malperfusion
- malplacement
- malreasoning
- malternative
- maltohexaose
- maltooctaose
- maltopentose
- maltosylated
- maltotriosyl
- mamegakinone
- mamelonation
- mamenchisaur
- mammaliaform
- mammalianise
- mammalogical
- mammaplastic
- mammillation
- mammilliform
- mammogenesis
- mammographer
- mammonolatry
- mammoplastic
- mammopoiesis
- mammopoietic
- mammospheric
- managemental
- managerially
- mancipleship
- mandalically
- mandaratoxin
- mandarinoite
- mandarinquat
- mandarinship
- mandibulated
- mandocellist
- mandolinlike
- mandragorite
- manelessness
- mangafodipir
- manganarsite
- manganblende
- manganesemia
- manganesious
- manganhumite
- manganimetry
The first 300 are shown.
Questions about these words
- How many twelve-letter words that start with M are there?
- Word.ws lists 270 twelve-letter words that start with M, plus 2,629 rare ones.
- What are common twelve-letter words that start with M?
- manufacturer, metropolitan, manufactured, mathematical, manipulation, modification, municipality and motivational.
- Which of the twelve-letter words that start with M has the highest letter score?
- muzzleloader scores 33 points with the standard letter tile values.
Related word lists
Source and license
Word lists and meanings adapted from the Wiktionary entry of each word. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out names, abbreviations, misspellings and offensive words, and ordered the most common words by how often they appear in English (wordfreq). Meanings from Wiktionary; this is not an official Scrabble, Words With Friends or Wordle word list. Wiktionary data of 2026-09-02.
Cite this page: “12-Letter Words Starting with M: 270 Words.” Word.ws, https://word.ws/words/12-letter/starting-with-m. Based on Wiktionary, CC BY-SA 4.0.