white tail vs whitetail

white tail and whitetail both are nouns.

Word	Noun	Adjective	Verb	Adverb
white tail	Yes	No	No	No
whitetail	Yes	No	No	No

As nouns, white tail and whitetail are synonyms defined as:

white tail and whitetail: common North American deer; tail has a white underside

Other synonyms of white tail include Odocoileus Virginianus, Virginia deer, white-tailed deer, whitetail deer.

white tail (noun)	whitetail (noun)
common North American deer; tail has a white underside	common North American deer; tail has a white underside