WordNet sense 1 (capable of wounding):

biting, mordacious, pungent, nipping

WordNet sense 2 (expressing or expressive of ridicule that wounds):

sarcastic

WordNet sense 3 (having or covered with protective barbs or quills or spines or thorns or setae etc.):

barbellate, bristly, prickly, spiny, thorny, setaceous, briary, briery, bristled, burred, burry, setose

WordNet sense 4 ((used of plants and animals) furnished with bristles and thorns):

armed