mule deer vs burro deer

mule deer and burro deer both are nouns.

Word	Noun	Adjective	Verb	Adverb
mule deer	Yes	No	No	No
burro deer	Yes	No	No	No

As nouns, mule deer and burro deer are synonyms defined as:

mule deer and burro deer: long-eared deer of western North America with two-pronged antlers

Other synonyms of mule deer include Odocoileus hemionus.

mule deer (noun)	burro deer (noun)
long-eared deer of western North America with two-pronged antlers	long-eared deer of western North America with two-pronged antlers