12-letter words containing a, c, o, y
- ceramography — the study, analysis, and preparation of ceramic microstructures, usually for industrial use
- cerebropathy — A hypochondriacal condition verging upon insanity, occurring in those whose brains have been unduly taxed.
- ceremonially — of, relating to, or characterized by ceremony; formal; ritual: a ceremonial occasion.
- chalcography — the art of engraving on copper or brass
- chalcopyrite — a widely distributed yellow mineral consisting of a sulphide of copper and iron in tetragonal crystalline form: the principal ore of copper. Formula: CuFeS2
- chaos theory — a theory, applied in various branches of science, that apparently random phenomena have underlying order
- charity shop — A charity shop is a shop that sells used goods cheaply and gives its profits to a charity.
- charity toss — a free shot given as a penalty for a foul
- charity work — unpaid work, usually fundraising, done in aid of a charity
- chartophylax — an official who serves chiefly as the chancellor and archivist of a diocese.
- cheiloplasty — plastic surgery of the lip.
- chemotherapy — Chemotherapy is the treatment of disease using chemicals. It is often used in treating cancer.
- chickahominy — a member of a North American Indian tribe of the Powhatan confederacy that inhabited eastern Virginia.
- chimneyboard — a partition or a cover to shut off a fireplace
- chivalrously — having the qualities of chivalry, as courage, courtesy, and loyalty.
- chlorenchyma — plant tissue consisting of parenchyma cells that contain chlorophyll
- cholerically — In a choleric manner.
- choreography — Choreography is the inventing of steps and movements for ballets and other dances.
- choux pastry — a very light pastry made with eggs, used for eclairs, etc
- chrestomathy — a collection of literary passages, used in the study of language
- christophany — an appearance or emergence of Christ following his crucifixion
- chromaticity — the quality of a colour or light with reference to its purity and its dominant wavelength
- chromatology — chromatics.
- chromography — (obsolete) chromolithography.
- chronography — an arrangement of past events
- chrysography — the art of writing in ink made of powdered gold suspended in a small amount of glair or gum.
- chrysophanol — (organic compound) A chemical compound found in rhubarb.
- chthonophagy — (disease) Alternative form of chthonophagia.
- chylocaulous — having fleshy stems.
- ciliary body — the part of the vascular tunic of the eye that connects the choroid with the iris
- circumrotary — Alternative form of circumrotatory.
- city company — (in Britain) a corporation that represents one of the historic trade guilds of London
- clairvoyance — the alleged power of perceiving things beyond the natural range of the senses
- clairvoyancy — the faculty of clairvoyance
- clairvoyants — Plural form of clairvoyant.
- clamourously — Archaic spelling of clamorously.
- clangorously — In a clangorous manner; ringingly.
- clap eyes on — to catch sight of
- clayton fern — a tall fern, Osmunda claytoniana, of eastern North America and eastern Asia, having an interruption of growth in the center of some fronds.
- coachability — a large, horse-drawn, four-wheeled carriage, usually enclosed.
- coffee royal — café royale.
- cogitatively — In a cogitative manner.
- collaterally — In collateral relation; not lineally.
- collegiality — the sharing of authority among colleagues
- collegiately — in a collegiate way
- collinearity — lying in the same straight line.
- colloquially — characteristic of or appropriate to ordinary or familiar conversation rather than formal speech or writing; informal.
- colporrhaphy — (surgery) suturing of a defect in the wall of the vagina.
- columbus day — Oct 12, a legal holiday in most states of the US: the date of Columbus' landing in the West Indies (Caribbean) in 1492
- combat-ready — ready for combat