- cyrilla
- colorado fir
- cftr
- colpocele
- colpocystocele
- chamaecytisus palmensis
- common broom
- cytogeny
- cytochrome
- curtsey
- curtsy
- curvedness
- curvey
- curve ball
- curvaceously
- curvature
- curvaceousness
- curvilinear correlation
- curvilinear regression
- curvilineal
- curving
- cusco
- curvy
- cush_cush
- cushing's disease
- cuscuta gronovii
- cushaw
- cushion flower
- cushing
- cushing's syndrome
- cushioned
- cushioning
- cushiony
- cushitic
- cusk
- cuspated
- cusp
- cuspate
- cuspidal
- cusped
- cuspidated
- cuspid
- cuspidor
- cuspidate
- cussedness
- cyperus rotundus
- cyphomandra
- cypraea
- cypraea moneta
- cypress sedge