- Cryptogram
- Constructive
- Constructs
- Construe
- Continuous
- Contort
- Contortion
- Contortionist
- Contoured
- Contraceptive
- Contract
- Contracted
- Contradiction
- Contrarian
- Contrariousness
- Contrariwise
- Convector
- Convenance
- Convenant
- Convener
- Convenient
- Conveniently
- convenor
- Convention center
- Converge
- Convergence
- Conversation
- Converse
- Convert ional weapons
- Convertibility
- Converts
- Conveyable
- Cooptation
- Coordinate clause
- Coordination
- Coorg
- Cop
- Coparcenary
- Coparcener
- Coppery
- Coprolite
- Corporation
- Corporeal
- Corpus
- Correlate
- Correlated
- Correlation
- Correspond with
- Correspondency
- Corroboration
- Corrodent
- Cost-cutting
- Costermonger
- Costly
- Costume
- Costume designer
- Costumer
- Costus
- Cot
- Coterminous
- Cottage
- Cottage industry
- Cotter
- Cotton planks
- Cotyledon
- Couch
- Couchant
- Could
- Coulter
- Counter-productive
- Counteract
- Counteraction
- Counterculture
- Counterfoil
- Countermeasure
- Counterpoint
- Country
- Country-made
- Countryman
- Countryside
- County clerk
- County council
- Coup de theatre
- Coupled with
- Coupler
- Couplet
- Court of justice
- Courteously
- Couscous
- Covalent
- Covariance
- Craftmanship
- Craftsmanship
- Crafty plan
- Craggy
- Crammer
- Cranberry
- Crank
- Cranky
- Crappy