Character, constitution, disposition, reputation, temper, temperament.
Characteristic, peculiarity, property, singularity, trait.
Chattering, garrulous, loquacious, talkative.
Cheer, comfort, delight, ecstasy, gaiety, gladness, gratification, happiness, jollity, satisfaction.
Churlish, crusty, gloomy, gruff, ill-natured, morose, sour, sullen, surly.
Class, circle, clique, coterie.
Cloak, cover, gloss over, mitigate, palliate, screen.
Cloy, sate, satiate, satisfy, surfeit.
Commit, confide, consign, entrust, relegate.
Compassion, forbearance, lenience, mercy.