bellyache vs squawk

bellyache and squawk both are nouns.

Word	Noun	Adjective	Verb	Adverb
bellyache	Yes	No	Yes	No
squawk	Yes	No	Yes	No

As verbs, bellyache and squawk are synonyms defined as:

Other synonyms of bellyache include beef, bitch, crab, gripe, grouse, holler.

bellyache (noun)	squawk (noun)
an ache localized in the stomach or abdominal region	informal terms for objecting
	the noise of squawking

bellyache (verb)	squawk (verb)
complain	complain
	utter a harsh abrupt scream