- 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
- Commiseratively Adv
- Commodiously Adv
- Commonly Adv
- Communally Adv
- Communicably Adv
- Communicatively Adv
- Communistically Adv
- Commutatively Adv
- Compactly Adv
- Companionably Adv
- Companywide Adj Adv
- Comparably Adv
- Comparatively Adv
- Compartmentally Adv
- Compassionately Adv
- Compatibly Adv
- Compellingly Adv
- Compendiously Adv
- Compensatively Adv
- Competently Adv
- Competingly Adv
- Competitively Adv
- Complacently Adv
- Complainingly Adv