bellyacher vs squawker

bellyacher and squawker both are nouns.

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

As nouns, bellyacher and squawker are synonyms defined as:

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

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

bellyacher (noun)	squawker (noun)
a person given to excessive complaints and crying and whining	the loudspeaker on an intercom or public address system
	a person given to excessive complaints and crying and whining