- Congratulations
- Congruence
- Conical
- Conifer
- Coniferous
- Conjugal
- Conjunction
- Conjunctiva
- Conjunctival suffusion
- Conky
- Connected
- Connections
- Consider
- Considerably
- Consideration
- Considered
- Consignment
- Consistency
- Consolation
- Console
- Consolidation
- Consoling
- Consonant
- Consonants
- Conventicle
- Conspectus
- 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
- Corn factor
- Corn-cob
- Cornice
- Coromandal coast
- Coronary arteries
- Corrosion
- Corrugated iron
- Corsair
- Coruscate
- Corvette
- Cosmetic
- Cosmic rays
- Cosmogony
- Cosmopolitan
- Cosmopolite
- Cosset
- Cost
- Cost of living
- Croaky
- Cosumed
- Cot with coir matting
- Cote
- Cotton
- Cotton cake
- Cotton on to
- Cotton wool
- Couch potato
- Cough