blacktail vs black-tailed deer

blacktail and black-tailed deer both are nouns.

Word	Noun	Adjective	Verb	Adverb
blacktail	Yes	No	No	No
black-tailed deer	Yes	No	No	No

As nouns, blacktail and black-tailed deer are synonyms defined as:

Other synonyms of blacktail include blacktail deer, Odocoileus hemionus columbianus.

blacktail (noun)	black-tailed deer (noun)
mule deer of western Rocky Mountains	mule deer of western Rocky Mountains