consistent, congruous, firm, and harmonious
cool, collected, calm, and self-possessed
copious, commanding, sonorous, and emotional
cowardly, timid, shrinking, and timorous
crazy, absurd, nonsensical, and preposterous
crude, rough, jagged, and pitiless
D
daring, cordial, discerning, and optimistic
darkness, dimness, dulness, and blackness
deadly, destructive, fatal, and implacable