prairie grouse vs prairie chicken

prairie grouse and prairie chicken both are nouns.

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

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

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

Other synonyms of prairie grouse include prairie fowl.

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