9-letter words containing a, c, o, i
- coralline — of, relating to, or resembling coral
- corallite — the skeleton of a coral polyp
- coralloid — of or resembling coral
- corbicula — pollen basket.
- cordially — courteous and gracious; friendly; warm: a cordial reception.
- coriander — Coriander is a plant with seeds that are used as a spice and leaves that are used as a herb.
- corivalry — joint or mutual rivalry
- corkonian — a native or inhabitant of the city of Cork
- cornbraid — to braid (hair) in close parallel rows, creating a hairstyle known as a corn row
- cornelian — carnelian
- cornicula — plural form of singular corniculum: small horn
- corniglia — a group of five coastal villages (Monterosso al Mare, Vernazza, Corniglia, Manarola, and Riomaggiore) on the Ligurian Sea in NW Italy, near La Spezia.
- corrading — Present participle of corrade.
- corraling — Present participle of corral.
- corrasion — erosion of a rock surface by rock fragments transported over it by water, wind, or ice
- corrasive — Obsolete form of corrosive.
- corsicana — a city in E Texas.
- cortadito — an espresso topped with an approximately equal amount of steamed milk.
- corticate — (of plants, seeds, etc) having a bark, husk, or rind
- corvallis — a city in W Oregon.
- corydalis — any erect or climbing plant of the N temperate genus Corydalis, having finely-lobed leaves and spurred yellow or pinkish flowers: family Fumariaceae
- coseismal — of or designating points at which earthquake waves are felt at the same time
- costalgia — Pain in the ribs, or the costal muscles.
- coticular — of or relating to whetstones
- cottaging — Cottaging is homosexual activity between men in public toilets.
- coulibiac — a Russian dish of rich pastry with a filling of salmon or other fish and mushrooms, onions, egg, buckwheat, dill, etc.
- couraging — Present participle of courage.
- courbaril — a tropical American leguminous tree, Hymenaea courbaril. Its wood is a useful timber and its gum is a source of copal
- cousinage — a kinship or relationship
- covariant — a variant that changes leaving interrelations with another variant (or variants) unchanged
- covariate — a statistical variable that changes in a predictable way and can be used to predict the outcome of a study
- cowardice — Cowardice is cowardly behaviour.
- cowardise — Obsolete spelling of cowardice.
- coxsackie — Any of several viruses of the genus Enterovirus similar to poliovirus.
- coxswains — Plural form of coxswain.
- craigavon — a district in central Northern Ireland, in Co Armagh. Pop: 57 685 (2001). Area: 279 sq km (108 sq miles)
- crayoning — Draw with a crayon or crayons.
- crayonist — (dated) An artist who uses crayons.
- creations — The action or process of bringing something into existence.
- cremation — to reduce (a dead body) to ashes by fire, especially as a funeral rite.
- crenation — any of the rounded teeth or the notches between them on a crenate structure
- crinoidal — (zoology) Relating to, consisting of, or containing crinoids.
- cristobal — seaport in Panama, at the Caribbean entrance to the Panama Canal: part of the city of Colón
- crocosmia — any plant of the cormous S. African genus Crocosmia, including the plant known to gardeners as montbretia: family Iridaceae
- croissant — Croissants are small, sweet bread rolls in the shape of a crescent that are eaten for breakfast.
- crorepati — (in India) a person whose assets are worth at least one crore or 10 million rupees
- crosshair — either of the two fine mutually perpendicular lines or wires that cross in the focal plane of a theodolite, gunsight, or other optical instrument and are used to define the line of sight
- crossrail — a horizontal slat forming part of the back of a chair.
- crotaline — of or relating to rattlesnakes (Crotalinae)
- crotalism — a type of poisoning caused by ingestion of plants of the genus Crotalaria