5-Letter Words Starting with O

All 140 five-letter words that start with O

OA

• oaked10adj. Of a wine: aged in oak so that it acquires flavor from tannins in the...
• oaken9adj. Made from the wood of the oak tree. Also in metaphorical uses...
• oakum11n. Coarse fibres separated by hackling from flax or hemp when preparing...
• oared6adj. Having oars.
• oasis5n. A spring of fresh water, surrounded by a fertile region of vegetation...
• oaten5adj. Of, pertaining to, or made of oats.

OB

• obeah10n. A form of folk magic, medicine or witchcraft originating in Africa and...
• obese7adj. Extremely overweight, especially: weighing more than 20% (for men) or...
• obong8n. The traditional ruler and cultural custodian of the Efik people of...

OC

• occur9v. To happen or take place.
• ocean7n. One of the large bodies of water separating the continents.
• ochre10n. A clay earth pigment containing silica, aluminum and ferric oxide.
• ocker11n. Interest on money; usury; increase.
• octal7n. The number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.
• octan7adj. Occurring every eight days.
• octet7n. A group or set of eight of something.
• octyl10n. Any of very many isomeric univalent hydrocarbon radicals, C₈H₁₇...

OD

• odden7v. To make or become odd (all senses).
• oddly10adv. In a peculiar manner; strangely; unusually.
• odeon6n. An ancient Greek or Roman building used for performances of music and...
• odium8n. Hatred; dislike.
• odori6n. An energetic Japanese style of folk dance.
• odour6n. UK standard spelling of odor.

OF

• offal11n. The internal organs of an animal (entrails or innards), used as food.
• offer11n. A proposal that has been made.
• oflag9n. A German prisoner-of-war camp for officers only.
• often8adv. Frequently; many times on different occasions.

OG

• ogive9n. The curve of a cumulative distribution function.

OH

• ohana8n. An extended Hawaiian family unit.
• ohmic12adj. Of or relating to, or measured in, ohms.

OI

• oikos9n. A basic societal unit in Ancient Greece; a household or family line.
• oiled6adj. Covered in, or supplied with, oil.
• oiler5n. An assistant in the engine room of a ship, senior only to a wiper...
• oiran5n. A high-status courtesan in Japan.

OK

• okada10n. A motorcycle taxi.
• okama11n. A gay man, in the context of Japanese culture, especially one who is...
• okapi11n. A ruminant (Okapia johnstoni) found in the rainforests of the Congo...
• okara9n. A food made from soybean pulp; a by-product of soy milk production.
• okina9n. The Hawaiian apostrophe-like letter (ʻ ) used to indicate the glottal...
• okiya12n. The lodging-house of a geisha.
• okrug10n. An administrative division of some Slavic states.

OL

• olden6adj. From or relating to a previous era.
• older6adj. Elderly.
• oldie6n. Something or someone old.
• oleic7adj. Of or pertaining to oil, especially to vegetable oil.
• olein5n. Any naturally-occurring greasy or oily substance related to fat.
• oleum7n. A solution of sulfur trioxide in sulfuric acid.
• oligo6n. An oligonucleotide.
• oliva8n. Olivary body.
• olive8n. A tree of species Olea europaea cultivated since ancient times in the...
• ollie5n. An aerial maneuver in which one catches air by leaping off the ground...
• ology9n. Any branch of learning, especially one ending in “-logy”.

OM

• omake11n. A special video feature that accompanies an anime, such as a collection...
• ombre9n. A Spanish card game, usually played by three people. It involves forty...
• omega8n. The twenty-fourth letter of the Classical and the Modern Greek...
• omena7n. In Kenya, small fish dried and milled into flour.
• omiai7n. A Japanese custom in which unattached individuals are introduced to...
• omics9n. Any of several biological subfields that aim to identify or...
• omkar11n. The symbol ॐ that represents the syllable “om” or “aum”.

ON

• onaga6n. Longtail snapper (Etelis coruscans), a species of ray-finned fish.
• onion5n. A monocotyledonous plant (Allium cepa), allied to garlic, used as...
• onium7n. Any cation derived by the addition of a proton to the hydride of any...
• onlay8v. To lay or place something on a surface.
• onsen5n. A (Japanese) hot spring.
• onset5n. The initial phase of a disease or condition, in which symptoms first...
• ontic7adj. Ontological.

OO

• oodle6n. A crossbreed of a poodle and another breed of dog.
• oomph12n. Strength, power, passion or effectiveness; clout.
• oontz14n. The game of craps.
• ooooh8interj. Elongated form of ooh.
• oopsy10interj. Synonym of oops.
• oorah8interj. The official yell for the US Marines.

OP

• opara7n. The oldest son, who has inherited the rights and responsibilities of...
• opera7n. A theatrical work, combining drama, music, song and sometimes dance...
• opine7v. To express an opinion; to state as an opinion; to suppose, consider...
• opium9n. A yellow-brown, addictive narcotic drug obtained from the dried juice...
• oplan7n. Operational plan.
• oppai9n. A woman's breasts, particularly of an anime or manga character.
• opsin7n. Any of a group of light-sensitive proteins in the retina.
• optic9adj. Of, or relating to the eye or to vision.

OR

• orach10n. Especially Atriplex hortensis.
• oracy10n. The ability to speak, and to understand spoken language.
• orale5n. A white silk veil with coloured stripes, sometimes worn by the pope.
• orate5v. To speak formally; to give a speech.
• orbed8adj. Having the form of an orb; round; spherical.
• orbit7n. An elliptical movement of an object about a celestial object or...
• order6n. Arrangement, disposition, or sequence.
• oread6n. A mountain nymph; an anthropomorphic appearance of the spirit of a...
• oreal5adj. Inhabiting high mountains.
• organ6n. The larger part of an organism, composed of tissues that perform...
• orgue6n. Any of a number of long, thick pieces of timber, pointed and shod with...
• oribi7n. Ourebia ourebi, a species of antelope.
• oriel5n. A large polygonal recess in a building, such as a bay window, forming a...
• origo6n. The reference point on which a deictic relationship is based.
• orlop7n. The platform over the hold of a ship that makes up the fourth or lowest...
• ormer7n. An abalone or sea-ear, particularly Haliotis tuberculata, common in the...
• oroya8n. A hanging basket attached to a cable, anciently used in South America...
• orris5n. Any of several irises that have a fragrant root, especially Iris ×...
• ortho8n. An isomer of a benzene derivative having two substituents adjacent on...
• orujo12n. A brandy from northern Spain, made from grapes.
• orval8n. A sage, of species Salvia viridis.

OS

• oscar7n. A cichlid fish of species Astronotus ocellatus, native to South...
• osier5n. A willow, of species Salix viminalis, growing in wet places in Europe...
• ossia5n. In a musical score, an alternative version of a passage, usually just a...
• osteo5n. Osteomyelitis.
• ostro5n. A southerly Mediterranean wind.

OT

• otaku9n. One with an obsessive interest in something, particularly (originally...
• other8adj. See other (determiner) below.
• otter5n. An aquatic or marine carnivorous mammal in the subfamily Lutrinae.

OU

• ouchy13adj. Painful, hurtful; that is expressed by the word ouch.
• ought9v. Indicating duty or obligation.
• ounce7n. An avoirdupois ounce, weighing ¹⁄₁₆ of an avoirdupois pound, or...
• ousia5n. The essential nature or ‘substance’ of God, often as contrasted to the...
• outdo6v. To excel; go beyond in performance; surpass.
• outen5adj. Being from without; strange; foreign; peculiar.
• outer5adj. Outside; external.
• outgo6v. To go out, to set forth, to set out.
• outie5n. A navel that protrudes from the abdomen.
• outro5n. A portion of music at the end of a song.
• outta5prep. Out of.
• ouzel14n. A Eurasian blackbird (Turdus merula).

OV

• ovary11n. A female reproductive organ, often paired, that produces ova in most...
• ovate8adj. Shaped like an egg.
• overo8n. A pinto horse with white-over-dark body markings.
• overt8adj. Open and not concealed or secret.
• ovine8adj. Of, being, pertaining to, or resembling a sheep; also, (not comparable)...
• ovoid9adj. Shaped like an oval.
• ovolo8n. A classical convex moulding carved with an egg and dart ornament.
• ovule8n. The structure in a plant that develops into a seed after fertilization...

OW

• owing9adj. Still to be paid; owed as a debt.
• owler8n. The alder tree.
• owlet8n. A young owl; owling.
• owned9adj. Having an owner who is part of a specified group.
• owner8n. One who owns something.

OX

• oxbow17n. A U-shaped piece of wood used as a collar for an ox, the upper parts of...
• oxide13n. A binary chemical compound of oxygen with another chemical element.
• oxime14n. Any of a class of organic compounds, of general formula RR'C=NOH...

OZ

• ozeki18n. A sumo wrestler ranking below yokozuna and above sekiwake; champion.
• ozone14n. An allotrope of oxygen (symbol O₃) having three atoms in the molecule...
• ozzie23n. A hospital.

Questions about these words

How many five-letter words that start with O are there?

Word.ws lists 140 five-letter words that start with O, plus 131 rare ones.

What are common five-letter words that start with O?

other, order, often, offer, older, owner, owned and ocean.

Which of the five-letter words that start with O has the highest letter score?

ozzie scores 23 points with the standard letter tile values.

Related word lists

• 5-Letter Words
• Words That Start with O
• 5-Letter Words Ending in O
• 4-Letter Words Starting with O
• 6-Letter Words Starting with O
• Q Words Without U