WordNet sense 1 (rough to the touch; covered with scales or scurf):

scabrous, scurfy, lepidote, leprose

WordNet sense 2 (having or caused by an irregular surface):

rough, unsmooth

WordNet sense 3 (having the body covered or partially covered with thin horny plates, as some fish and reptiles):

scaled, scaley

WordNet sense 4 (used of animals; provided with protective covering):

armored, armoured