Synonyms:
- bellyacher,
- complainant,
- complainer,
- crab,
- crank,
- croaker,
- crosspatch,
- faultfinder,
- frondeur,
- griper,
- grouch,
- grouser,
- growler,
- kicker,
- kvetch,
- malcontent,
- murmurer,
- mutterer,
- querulous person,
- reactionary,
- reactionist,
- rebel,
- sorehead,
- whiner