- Conch with spirals
- Conch-blower
- Conch-blowing
- Concierge
- Condemned cell
- Condensate
- Condescension
- Condign
- Conditioned reflex
- Conditioner
- Condolence
- Condom
- Condone
- Condor
- Conduce
- Conduction
- Conductivity
- Conducts
- Conduit
- Cone
- Confiscation
- Conflate
- Conformation
- Conformist
- Confounded
- Confrontationist
- Confused
- Confutation
- Congenital
- Congested
- Congestion
- Conniver
- Connubial
- Conquer
- Conquering
- Consecution
- Consecutive
- Consecutively
- Consent
- Consequence
- Consequent
- Conspicuous
- Constable
- Constipate
- Constipation
- Constitution
- Constitutional
- Constraint
- Constriction
- Construction
- Constructive thinking
- Consuetude
- Consul
- Consular
- Consult
- Consumable, consumer
- Consumer goods
- Consumes
- Consummate
- Consummate trickster
- Consummated
- Consummately, consummation
- Contagion
- Containment
- Contains 15 letters
- Contains 17 letters
- Continual
- Continuance
- Continuum
- Contraception
- Contractile
- Contractile vacuole
- Contraction
- Contracture
- Contradict
- Contradiction in terms
- Contraindication
- Contrariety
- Convene
- Convener , convenor
- Convent
- Convergent
- Conversational
- Conversationalist
- Converter
- Cooling
- Coolly
- Coon
- Coop
- Cooperation
- Cooperative
- Coordinated
- Coordinator
- Copacetic
- Copasetic
- Copper
- Copper coin
- Copper-coloured
- Coppice
- Corn circle