Synonyms of grumble

1 Syllable

growl, mope, ning, moan, moans, carp, cc, ned, groans, kvetch, groan

2 Syllables

rumbling, groaned, yammers, mumbled, rumbled, fussed, whirred, griped, complain, complaint, growled, groaning, beefed, moping, whined, whining, complains, rumble, gnarling, moaned, mumble, mumbling, growling, fussing, yammer, griping, grumped, murmurs, drumbeat, carped, niggled, groused, murmur, moped, moaning

3 Syllables

bellyaching, yammering, yammered, repine, susurrus, complained, repining

4 Syllables

murmuration, bombinate, susurration