white fox vs Alopex lagopus

white fox and Alopex lagopus both are nouns.

Word	Noun	Adjective	Verb	Adverb
white fox	Yes	No	No	No
Alopex lagopus	Yes	No	No	No

As nouns, white fox and Alopex lagopus are synonyms defined as:

white fox and Alopex lagopus: thickly-furred fox of Arctic regions; brownish in summer and white in winter

Other synonyms of white fox include Arctic fox.

white fox (noun)	Alopex lagopus (noun)
thickly-furred fox of Arctic regions; brownish in summer and white in winter	thickly-furred fox of Arctic regions; brownish in summer and white in winter