THESAURUS
grousing
beef, beefing, bellyache, bellyaching, bitch, bitching, complaining, complaint, complaintful, crabbing, crabby, cranky, croaking, destructive criticism, disappointed, discontented, disgruntled, displeased, dissatisfied, dissent, envious, faultfinding, grievance, gripe, griping, groan, groaning, grouchy, grouse, growling, grumbling, holler, howl, kick, kicking, malcontent, malcontented, murmuring, muttering, out of humor, peeve, peevish, peevishness, pet peeve, petulance, petulant, protest, querulant, querulous, querulousness, rebellious, resentful, restive, restless, scolding, sniping, squawk, squawking, sulky, unaccepting, unaccommodating, uneasy, unfulfilled, ungratified, unhappy, unsatisfied, whining, whiny, yapping
