Ant. Base, bottom, floor, foot, pedestal, foundation, sole; infamy, shame.
Crown, v. Complete, consummate, conclude, seal, achieve, accomplish.
Ant. Mar, spoil, frustrate, fail.
Crucial. Severe, trying, searching, decisive, critical, momentous, strategic.
Ant. Superficial, indifferent, mild, lenient, lax, unimportant.
Crude. Raw, immature, unripe; coarse, unrefined; undigested, unconsidered, unpolished, uncouth, awkward.
Ant. Mature; refined, sensitive; well-considered, finished, classical, highly wrought, elaborate.
Cruel. Inhuman, merciless, unfeeling, dire, ruthless, pitiless, relentless, savage, brutal, ferocious, blood-thirsty, sanguinary; severe, sharp, bitter, hard.
Ant. Gentle, mild, merciful, humane, forbearing, generous.
Crush. Pound, crumble, demolish, overpower, squeeze, compress, bruise, shatter, raze, pulverize.