partridge vs grouse

partridge and grouse both are nouns.

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

As nouns, grouse is a hypernym of partridge; that is, grouse is a word with a broader meaning than partridge:

partridge (noun)	grouse (noun)
small Old World gallinaceous game birds	popular game bird having a plump body and feathered legs and feet
a popular North American game bird; named for its call	flesh of any of various grouse of the family Tetraonidae; usually roasted; flesh too dry to broil
valued as a game bird in eastern United States and Canada
heavy-bodied small-winged South American game bird resembling a gallinaceous bird but related to the ratite birds
flesh of either quail or grouse

partridge (verb)	grouse (verb)
	complain
	hunt grouse