WordNet sense 1 (causing abrasion):

abrasive

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

rough, unsmooth

WordNet sense 3 (easily irritated or annoyed):

cranky, fractious, irritable, nettlesome, peevish, pettish, petulant, testy, peckish, techy, tetchy

WordNet sense 4 (having an irritable and unpleasant disposition):

ill-natured

WordNet sense 5 (lacking consistency):

spotty, uneven

WordNet sense 6 (displaying a lack of consistency):

inconsistent

WordNet sense 7 (unpleasantly harsh or grating in sound):

grating, gravel, gravelly, raspy, rasping

WordNet sense 8 (having an unpleasant sound):

cacophonous, cacophonic