musk deer vs Moschus moschiferus

musk deer and Moschus moschiferus both are nouns.

Word	Noun	Adjective	Verb	Adverb
musk deer	Yes	No	No	No
Moschus moschiferus	Yes	No	No	No

As nouns, musk deer and Moschus moschiferus are synonyms defined as:

musk deer and Moschus moschiferus: small heavy-limbed upland deer of central Asia; male secretes valued musk

musk deer (noun)	Moschus moschiferus (noun)
small heavy-limbed upland deer of central Asia; male secretes valued musk	small heavy-limbed upland deer of central Asia; male secretes valued musk