Synonyms of grouser

1 Syllable
crab, bear, crank, bug, grouch, grump
2 Syllables
gripers, grouches, sourpuss, kicker, grouched, growler, crosspatch, grumbler, moaner, whiner, griper
3 Syllables
malcontent, curmudgeon, complainer, mutterers, murmurer, mutterer, faultfinder, bellyacher, sorehead