whiner vs bellyacher

whiner and bellyacher both are nouns.

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

As nouns, whiner and bellyacher are synonyms defined as:

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

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

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