- Country-boat
- County
- Covering
- Covert place
- Covertness
- Covetous
- Cow pox
- Cowardice
- Cowboy
- Cowhand
- Cowherdess
- Crag
- Crake
- Cram full
- Crammed
- Cramped
- Crams
- Crate
- Crater
- Cravat
- Craven
- Crawler
- Crawling
- Crayfish
- Crayon
- Criminality
- Criminologist
- Crinkum-crankum
- Crippling
- Crisis
- Crispy
- Criterion
- Critical
- Critical spirit
- Critical stage in small-pox
- Croak
- Crocus
- Cross-eyed
- Cross-fertilize
- Crumple
- Cross-question
- Crossbenches
- Crossbones
- Crossfire
- Crossing bounds
- Crossly
- Crossroads
- Crossway
- Crosswind
- Crosswise throw
- Crossword
- Crotchety
- Crouched
- Crying
- Crypto
- Crypto communist
- Crystal
- Crystallize
- Crystals
- Csi
- Cub
- Cubic root
- Cubicle
- Cultural
- Culture
- Cultured
- Cultured person
- Cumin
- Cumin seed
- Cumminseed
- Cumulative
- Cuneiform
- Cuniform writing
- Cunning fellow
- Cunningness
- Cupboard love
- Cutlet
- Cuppa
- Currently
- Curricle
- Curriculum
- Currier
- Curry-leaf tree
- Cursing
- Cursive
- Cursoriness
- Curt
- Curtail
- Curtly
- Curvaceous
- Curvature
- Cyclone
- Cylindrical
- Cymbals
- Cynophilist
- Cyperus
- Cyperus rotendus
- Cypher
- Cyprinid
- Cystic fibrosis