bighorn vs bighorn sheep

bighorn and bighorn sheep both are nouns.

Word	Noun	Adjective	Verb	Adverb
bighorn	Yes	No	No	No
bighorn sheep	Yes	No	No	No

As nouns, bighorn and bighorn sheep are synonyms defined as:

bighorn and bighorn sheep: wild sheep of mountainous regions of western North America having massive curled horns

Other synonyms of bighorn include cimarron, Ovis canadensis, Rocky Mountain bighorn, Rocky Mountain sheep.

bighorn (noun)	bighorn sheep (noun)
wild sheep of mountainous regions of western North America having massive curled horns	wild sheep of mountainous regions of western North America having massive curled horns