wildfowl vs grouse

wildfowl and grouse both are nouns.

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

As nouns, grouse is a hyponym of wildfowl; that is, grouse is a word with a more specific, narrower meaning than wildfowl:

wildfowl: flesh of any of a number of wild game birds suitable for food
grouse: flesh of any of various grouse of the family Tetraonidae; usually roasted; flesh too dry to broil

Other hyponyms of wildfowl include quail, partridge, pheasant.

wildfowl (noun)	grouse (noun)
flesh of any of a number of wild game birds suitable for food	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

wildfowl (verb)	grouse (verb)
	complain
	hunt grouse