Word Study
grumpy
OXFORD DICTIONARY
grumpy, adj. (grumpier, grumpiest) morosely irritable; surly.
Derivative
grumpily adv. grumpiness n.
ROGET THESAURUS
grumpy
Sullenness
N sullenness, morosity, spleen, churlishness, irascibility, moodiness, perversity, obstinacy, torvity, spinosity, crabbedness, ill temper, bad temper, ill humor, bad humor, sulks, dudgeon, mumps, dumps, doldrums, fit of the sulks, bouderie, black looks, scowl, grouch, huff, sullen, sulky, ill-tempered, ill-humored, ill-affected, ill- disposed, grouty, in an ill temper, in a bad temper, in a shocking temper, in an ill humor, in a bad humor, in a shocking humor, out of temper, out of humor, knaggy, torvous, crusty, crabbed, sour, sour as a crab, surly, moody, spleenish, spleenly, splenetic, cankered, cross, crossgrained, perverse, wayward, humorsome, restiff, restive, cantankerous, intractable, exceptious, sinistrous, deaf to reason, unaccommodating, rusty, froward, cussed, dogged, grumpy, glum, grim, grum, morose, frumpish, in the sulks, out of sorts, scowling, glowering, growling, grouchy, peevish.For further exploring for "grumpy" in Webster Dictionary Online