Thesaurus

Synonyms for Gruff include:

atrabilious, bad-tempered, bilious, bristly, cackly, cacophonic, cacophonous, cantankerous, choleric, churlish, crabbed, crabby, cranky, croaking, croaky, cross, crotchety, crusty, curmudgeonly, currish, dark, disagreeable, dour, dyspeptic, fractious, fussy, glowering, glum, grating, gravel, gravelly, grouchy, gruff, grumpy, guttural, hoarse, hot-tempered, hotheaded, huffish, husky, ill-humored, ill-humoured, ill-natured, ill-tempered, irascible, irritable, jangling, jangly, jarring, liverish, misanthropic, misanthropical, misogynous, moody, morose, nagging, nettlesome, noisy, ornery, peckish, peevish, pettish, petulant, piercing, prickly, quick-tempered, rasping, raspy, raucous, rending, ripping, rough, saturnine, scratchy, shirty, short-tempered, shrewish, snappish, snappy, snorty, sour, splenetic, splitting, spoiled, spoilt, squawky, strident, sulky, sullen, surly, techy, testy, tetchy, ugly, unpleasant, vinegarish, vinegary, waspish

gruff is a ADJ.