moaner vs bellyacher

moaner and bellyacher both are nouns.

Word	Noun	Adjective	Verb	Adverb
moaner	Yes	No	No	No
bellyacher	Yes	No	No	No

As nouns, moaner and bellyacher are synonyms defined as:

moaner and bellyacher: a person given to excessive complaints and crying and whining

Other synonyms of moaner include complainer, crybaby, grumbler, sniveller, squawker, whiner.

moaner (noun)	bellyacher (noun)
a person given to excessive complaints and crying and whining	a person given to excessive complaints and crying and whining