Synonyms of curmudgeon

1 Syllable
crab, crank, grouch, grump
2 Syllables
grouser, sulkers, gripers, grouches, crabbing, sourpuss, grouched, growler, crosspatch, grumbler, moaner, killjoy, griper, whiner, sulker
3 Syllables
mutterers, mutterer, faultfinder, bellyacher, sorehead