- chrysanthemum morifolium
- cimetidine
- closed universe
- cosmos
- common wallaby
- curie
- cuckoo's nest
- crazy house
- chile tarweed
- common madia
- capital of wisconsin
- common tarweed
- crazily
- coral
- capital of spain
- coelenterate genus
- count maurice maeterlinck
- current
- Charybdis
- cork jacket
- cosa nostra
- comic book
- cassette tape
- charnel
- crab legs
- cronyn
- crookback
- crown wart
- crownbeard
- conjury
- charming
- concrete
- capped
- curbside
- card trick
- Carya illinoinsis
- Carya illinoensis
- cashew
- cashew tree
- conjurer
- cicala
- conjuror
- coatee
- coat button
- control surface
- Colombian monetary unit
- Cape Verde monetary unit
- Costa Rican monetary unit
- Chinese monetary unit
- Chilean monetary unit