bellyache vs grouse

bellyache and grouse both are nouns.

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

As verbs, bellyache and grouse are synonyms defined as:

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

bellyache (noun)	grouse (noun)
an ache localized in the stomach or abdominal region	popular game bird having a plump body and feathered legs and feet
	flesh of any of various grouse of the family Tetraonidae; usually roasted; flesh too dry to broil

bellyache (verb)	grouse (verb)
complain	complain
	hunt grouse