13-Letter Words Starting with A

All 182 thirteen-letter words that start with A

AB

• aboriginality19n. The quality of being aboriginal.
• abortifacient20adj. Producing miscarriage.

AC

• accelerometer19n. An instrument for measuring acceleration.
• acceptability24n. The quality of being acceptable; acceptableness.
• accessibility22n. The quality of being accessible, or of admitting approach...
• acclimatation19n. Acclimatization.
• accommodating23adj. Affording, or disposed to afford, accommodation; obliging; helpful.
• accommodation22n. Lodging in a dwelling or similar living quarters afforded to travellers...
• accommodative25adj. Supplying with or obliging; accommodating.
• accompaniment23n. A part, usually performed by instruments, that gives support or adds to...
• accreditation18n. The giving of credentials.
• acculturation17n. A process by which the culture of a society changes on contact with a...
• acculturative20adj. Tending to produce acculturation.
• acetaminophen22n. A white crystalline compound used in medicine as an anodyne to relieve...
• acetazolamide27n. A drug that inhibits the enzyme carbonic anhydrase, used in the...
• acetylacetone20n. The diketone CH₃COCH₂COCH₃ used as a solvent and as a coordination...
• acetylcholine23n. A neurotransmitter in humans and other animals. It is an ester of...
• achievability26n. The state or condition of being achievable.
• achromatopsia22n. Total color blindness; the total inability to distinguish colors due to...
• acidification21n. The act or process of making something sour (acidifying), or changing...
• acinetobacter19n. Any bacterium of the genus Acinetobacter.
• acknowledging25adj. That acknowledges, in various sense; (especially) that notices or...
• acrimoniously20adv. In an acrimonious manner; with acrimony.
• acrobatically22adv. In an acrobatic manner.
• acrylonitrile18n. A toxic colourless liquid organic compound, CH₂=CH.CN, synthesized from...
• actinomorphic24adj. Having its petals arranged in a radially symmetric fashion.
• actinomycosis22n. An infectious bacterial disease of cattle and swine, sometimes...
• actualization24n. Making actual or really existent.
• acupuncturist19n. A healthcare professional who is qualified or professionally engaged in...

AD

• adaptationist16n. A supporter of adaptationism.
• addictiveness20n. The characteristic of being addictive.
• additionality18n. The property of being additional.
• adenoidectomy22n. Surgical removal of the adenoids, or of adenoid growths in the...
• adiabatically21adv. In an adiabatic way.
• adjustability26n. The state or condition of being adjustable.
• admeasurement18n. Apportionment.
• administering17n. Administration.
• administrator16n. One who administers affairs; one who directs, manages, executes, or...
• admissibility21n. The state or quality of being admissible or allowable.
• adrenalectomy21n. The removal of one or both adrenal glands, usually advised for patients...
• adventuresome19adj. Characterised or marked by adventure.
• adventurously20adv. In an adventurous manner.

AE

• aeroacoustics17n. A branch of acoustics that studies noise generation via either...
• aerodigestive18adj. Pertaining to the airway and digestive tract.
• aesthetically21adv. In an aesthetic manner; with a pleasing sensory effect.

AF

• affirmatively27adv. In an affirming manner.
• affordability25n. The extent or degree to which something is affordable, as measured by...
• afforestation19n. The act or process of creating a new forest where none had existed...

AG

• aggiornamento17n. Synonym of update, especially in reference to Italian scholarship or...
• agglomeration17n. The act or process of collecting in a mass; a heaping together.
• agglutination15n. The act of uniting by glue or other tenacious substance; the state of...
• agglutinative18adj. Sticky, tacky, adhesive.
• aggravatingly22adv. In an aggravating manner.
• agreeableness16n. The quality of being agreeable or pleasing; that quality which gives...
• agriculturist16n. One who practices agriculture, a farmer, a gardener.
• agrobacterium20n. A soil bacterium, of the genus Agrobacterium, which can fix nitrogen...
• agroecosystem21n. A conceptual model of an agricultural system (crop, farm or whole...

AI

• airworthiness19n. The state of being airworthy.

AL

• albertosaurus15n. A large carnivorous tyrannosaur dinosaur, of genus Albertosaurus...
• aldosteronism16n. A condition, marked by excessive secretion of aldosterone, that gives...
• algebraically21adv. Using algebra.
• alhamdulillah22interj. Praise be to God; thank God.
• allegorically19adv. In an allegorical manner.
• allergenicity19n. The property or degree of being allergenic.
• allochthonous21adj. Originating in a place other than where it is found.
• alternatingly17adv. In an alternating manner; taking turns.
• alternatively19adv. In an alternative way.

AM

• ambassadorial18adj. Of or pertaining to an ambassador.
• ambidexterity28n. The property of being equally skillful with each hand.
• ambitiousness17n. The state or quality of being ambitious.
• ameloblastoma19n. A rare benign tumour of the upper or lower jaw.
• amitriptyline20n. An antidepressant drug; a tablet containing this drug.
• amniocentesis17n. A procedure for obtaining amniotic fluid from a pregnant animal, by...
• amplification22n. The act, or result of amplifying, enlarging, extending or adding.
• amyloidogenic22adj. Relating to amyloidogenesis.

AN

• anachronistic20adj. Erroneous in date; containing an anachronism; in a wrong time; not...
• anaerobically20adv. In an anaerobic manner; in a way that does not require oxygen....
• anaphylactoid24adj. Of, pertaining to, or resembling anaphylaxis.
• anglicisation16n. The process by which something or someone (usually a word) is made more...
• anglicization25n. American spelling and Oxford British English standard spelling of...
• annexationist20n. An advocate of annexation.
• anonymization27n. The act or process of making anonymous, of hiding or disguising...
• answerability21n. The state of being answerable.
• anterolateral13adj. In front of the body, away from the midline.
• anthracycline23n. Any of a class of antibiotic, chemotherapeutic agents used to treat...
• anthraquinone25n. A tricyclic quinone, derived from anthracene.
• anthropogenic21adj. Pertaining to the origin of man (anthropogeny).
• anthropometry23n. The science of measuring the human body to ascertain the ranges and...
• anthroposophy26n. A philosophy founded in the early 20th century by the esotericist...
• antiapoptotic19adj. Acting to prevent apoptosis.
• antibacterial17adj. Killing or inhibiting bacteria.
• antiballistic17adj. Designed to detect, intercept, and destroy a ballistic missile in...
• antichristian18adj. Pertaining to Antichrist.
• anticlimactic21adj. Lacking climax, disappointing or ironically insignificant following of...
• anticlockwise24adj. In a circular fashion so as to be moving to the left at the top of the...
• anticoagulant16n. A substance that prevents coagulation (stops blood from clotting)...
• anticommunism21n. Opposition to communism.
• anticommunist19adj. Opposed to the tenets of communism.
• anticorrosion15adj. Preventing corrosion.
• anticorrosive18n. An agent that prevents or stops corrosion.
• antidiarrheal17adj. Preventing or treating diarrhea.
• antiepileptic19adj. Acting to prevent epileptic seizures.
• antigenically19adv. In the manner of an antigen.
• antihistamine18n. A drug that counteracts the effects of a histamine. Commonly used to...
• antimicrobial19adj. Tending to destroy or capable of destroying microbes.
• antinomianism17n. The belief or teaching that because only the spiritual "law of faith"...
• antioxidative24adj. That functions as an antioxidant.
• antiparasitic17adj. That counters infection by parasites.
• antipersonnel15adj. Designed to kill soldiers.
• antiprotozoal24adj. That inhibits or destroys protozoa.
• antipsychotic25adj. Preventing or counteracting psychosis.
• antireligious14adj. Opposed to religion.
• antirheumatic20adj. Serving to prevent or counter rheumatism.
• antispasmodic20adj. Referring to something that suppresses spasms, generally a drug.
• antisubmarine17adj. Intended for use against submarines.
• antisymmetric22adj. Having the property that, for any two distinct elements of S, at least...
• antiterrorism15n. Activity aiming at opposing or preventing terrorism.
• antiterrorist13adj. Preventing or counteracting terrorism, or reducing the threat from...

AP

• apathetically23adv. In an apathetic manner.
• apocalyptical24adj. Apocalyptic.
• applicability24n. The degree to which a thing is applicable.
• apportionment19n. The act of apportioning or the state of being apportioned.
• appropriately22adv. In an appropriate manner; properly; suitably.
• appropriation19n. An act or instance of appropriating.
• appropriative22adj. Taking or setting apart for oneself; appropriating; constituting...
• approximately29adv. Imprecise but close to in quantity or amount.
• approximation26n. The act, process or result of approximating, as.
• approximative29adj. Of, relating to, or being an estimate or approximation.
• appurtenances19n. Equipment used for a specific task or purpose; gear.

AR

• arachnophobia25n. An abnormal or irrational fear of arachnids, especially spiders.
• arbitrability20n. The characteristic of being arbitrable; the ability to be arbitrated.
• arbitrariness15n. The quality or state of being arbitrary; the extent to which something...
• arboriculture17n. The branch of horticulture concerned with the planting, growth, and...
• archaeologist19n. Someone who studies or practises archaeology.
• archbishopric27n. The rank or office of an archbishop.
• archimandrite21n. The superior of a large monastery, or group of monasteries, in the...
• architectonic22adj. Relating to or characteristic of architecture, design and construction.
• architectural20adj. Pertaining to architecture.
• argumentation16n. Inference based on reasoning from given propositions.
• argumentative19adj. Of or relating to argumentation; specifically, presenting a logical...
• armamentarium19n. All of the equipment available for carrying out a task, especially all...
• aromatization24n. The conversion of aliphatic components of petroleum into aromatic...
• arteriography22n. Radiography of an artery.
• arteriovenous16adj. Relating to the arteries and the veins.
• artificiality21n. The quality of being artificial or produced unnaturally.

AS

• ascertainable17adj. Able to be ascertained.
• ascertainment17n. The act of ascertaining.
• aspergillosis16n. Any of various infections by fungi of the genus Aspergillus that cause...
• assassination13n. The murder of a person, especially for political reasons or for...
• assemblywoman25n. A female member of an assembly.
• assertiveness16n. The quality of being assertive.
• assistantship18n. The occupation of being an assistant.
• associateship20n. The rank or period of being an associate.
• associational15adj. Of, pertaining to or deriving from association.
• associativity21n. The condition of being associative.
• asthenosphere21n. A portion of the Earth's upper mantle, below the lithosphere.
• astonishingly20adv. In an astonishing manner; so as to surprise or astonish.
• astrodynamics21n. The study of the motion of rockets and spacecraft, usually from...
• astronautical15adj. Referring to travel in outer space.
• astroparticle17n. A subatomic particle of cosmic origin.
• astrophysical23adj. Of or pertaining to astrophysics.

AT

• atherogenesis17n. The formation of atheromas, especially on the walls of the arteries.
• atmospherical22adj. Atmospheric.
• attainability18n. The state of being attainable.
• attentiveness16n. The state or quality of being attentive.
• attributional15adj. Of or pertaining to attribution.
• attributively21adv. In an attributive manner.

AU

• authentically21adv. In an authentic manner; genuinely.
• authenticator18n. One who, or something which, authenticates, as.
• authoritarian16adj. Of, or relating to, or exhibiting strict obedience to an authority...
• authoritative19adj. Arising or originating from a figure of authority.
• authorization25n. An act of authorizing.
• autobiography24n. A self-written biography; the story of one's own life.
• autocatalytic20adj. Catalyzed by one of its own products.
• autocephalous20adj. Fully independent of the authority of any other church.
• autochthonous21adj. Native to the place where found; indigenous.
• autogenerated15adj. Generated automatically, usually by a computer program.
• automagically21adv. In an automagical manner; happening seemingly without effort.
• automatically20adv. In an automatic manner.
• autophagosome21n. A phagosome in which part of a cell's own cytoplasm is digested.
• autoresponder16n. A computer program that automatically sends a certain message or...

AX

• axiomatically27adv. By the use of axioms; in the form of an axiom.

Questions about these words

How many thirteen-letter words that start with A are there?

Word.ws lists 182 thirteen-letter words that start with A, plus 2,130 rare ones.

What are common thirteen-letter words that start with A?

approximately, automatically, administrator, accommodation, architectural, assassination, alternatively and appropriately.

Which of the thirteen-letter words that start with A has the highest letter score?

approximative scores 29 points with the standard letter tile values.

Related word lists

• 13-Letter Words
• Words That Start with A
• 12-Letter Words Starting with A
• 14-Letter Words Starting with A
• Q Words Without U