prairie chicken vs prairie grouse

prairie chicken and prairie grouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
prairie chicken	Yes	No	No	No
prairie grouse	Yes	No	No	No

As nouns, prairie chicken and prairie grouse are synonyms defined as:

prairie chicken and prairie grouse: brown mottled North American grouse of western prairies

Other synonyms of prairie chicken include prairie fowl.

prairie chicken (noun)	prairie grouse (noun)
brown mottled North American grouse of western prairies	brown mottled North American grouse of western prairies