- Considered
- Consignment
- Consistency
- Consolation
- Console
- Consolidation
- Consoling
- Consonant
- Consonants
- Conventicle
- Conspectus
- Constable
- Constipate
- Constipation
- Constitution
- Constitutional
- Constraint
- Constriction
- Construction
- Constructive thinking
- Consuetude
- Consul
- Consular
- Continual
- Continuance
- Continuum
- Contraception
- Contractile
- Contractile vacuole
- Contraction
- Contracture
- Contradict
- Contradiction in terms
- Contraindication
- Contrariety
- Convivium
- Convulsive
- Coo
- Cook ones goose
- Cool drink
- 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
- Council-chamber
- Counsel
- Counselled
- Count noses
- Countenance
- Counter
- Counter band goods
- Counter charge
- Counter check
- Counter march
- Counter-attraction
- County court
- County town
- Coupe
- Coupe de etat
- Couplate
- Coupon
- Courageously
- Course
- Courser
- Court fool
- Courteous
- Courtesy
- Courtship
- Courtyard
- Cove
- Cowling
- Cowpie
- Cowrie
- Cows urine
- Cowslip
- Cox
- Coz
- Cozen
- Cracker
- Crackle
- Cracksman
- Creep
- Creeper cynanchum acidum
- Crepitate
- Cricket
- Cried