- Cloudlessly Adv
- Clownishly Adv
- Cloyingly Adv
- Clumsily Adv
- Clusteringly Adv
- Coarsely Adv
- Coastwise Adj Adv
- Coaxially Adv
- Coaxingly Adv
- Cockily Adv
- Coeducationally Adv
- Coefficiently Adv
- Coenzymatically Adv
- Coequally Adv
- Coercively Adv
- Coevally Adv
- Coextensively Adv
- Cofinally Adv
- Cogently Adv
- Cogitatively Adv
- Cognisably Adv
- Cognitively Adv
- Cognizably Adv
- Cogradiently Adv
- Coherently Adv
- Cohesively Adv
- Cohomologically Adv
- Cohomologously Adv
- Coincidentally Adv
- Coitally Adv
- Coldly Adv
- Collaboratively Adv
- Collaterally Adv
- Collectedly Adv
- Collectionwise Adv
- Collectively Adv
- Collegially Adv
- Colloidally Adv
- Colloquially Adv
- Collusively Adv
- Colonially Adv
- Colorably Adv
- Colorfully Adv
- Colossally Adv
- Colourably Adv
- Colourfully Adv
- Columnwise Adv
- Combatively Adv
- Combinatorially Adv
- Combustibly Adv
- Combustively Adv
- Comfortably Adv
- Comfortingly Adv
- Comically Adv
- Commemoratively Adv
- Commendably Adv
- Commendatorily Adv
- Commensurably Adv
- Commensurately Adv
- Commercially Adv