blacktail deer vs black-tailed deer

blacktail deer and black-tailed deer both are nouns.

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

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

blacktail deer and black-tailed deer: mule deer of western Rocky Mountains

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

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