calm × windy, troubled
capable × incapable
careful × careless
cheap × expensive
cheerful × sad, discouraged, dreary
clear × cloudy, opaque
clever × stupid
clockwise × counterclockwise
close × far, distant
closed × open
cold × hot
combine × separate
come × go
comfort × discomfort
common × rare
contract × expand
cool × warm
correct × incorrect, wrong
courage × cowardice
create × destroy
crooked × straight
cruel × kind
compulsory × voluntary
courteous × discourteous, rude
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