- Creditably Adv
- Credulously Adv
- Creepily Adv
- Crescendo Noun Adj Adv Verb
- Crestfallenly Adv
- Criminally Adv
- Criminologically Adv
- Crispily Adv
- Crisply Adv
- Critically Adv
- Croakily Adv
- Cronishly Adv
- Crookedly Adv
- Cross-country Adj Noun Adv
- Crossly Adv
- Crosswise Adj Adv
- Croupily Adv
- Crucially Adv
- Cruciformly Adv
- Crudely Adv
- Cruelly Adv
- Crushingly Adv
- Crustily Adv
- Cryingly Adv
- Cryobiologically Adv
- Cryogenically Adv
- Cryptically Adv
- Cryptographically Adv
- Cubbishly Adv
- Cubicly Adv
- Culpably Adv
- Culturally Adv
- Cumbrously Adv
- Cumulatively Adv
- Cunningly Adv
- Curably Adv
- Curatively Adv
- Curiously Adv
- Curlily Adv
- Curlingly Adv
- Currently Adv
- Cursedly Adv
- Cursively Adv
- Cursorily Adv
- Curtly Adv
- Curvaceously Adv
- Curvedly Adv
- Curvilinearly Adv
- Cushily Adv
- Cussedly Adv
- Custodially Adv
- Customarily Adv
- Cutaneously Adv
- Cutely Adv
- Cuttingly Adv
- Cybernetically Adv
- Cyclically Adv
- Cyclonically Adv
- Cylindrically Adv
- Cymosely Adv