sage grouse vs sage hen

sage grouse and sage hen both are nouns.

Word	Noun	Adjective	Verb	Adverb
sage grouse	Yes	No	No	No
sage hen	Yes	No	No	No

As nouns, sage grouse and sage hen are synonyms defined as:

sage grouse and sage hen: large grouse of sagebrush regions of North America

Other synonyms of sage grouse include Centrocercus urophasianus.

sage grouse (noun)	sage hen (noun)
large grouse of sagebrush regions of North America	large grouse of sagebrush regions of North America