gray wolf vs Canis lupus

gray wolf and Canis lupus both are nouns.

Word	Noun	Adjective	Verb	Adverb
gray wolf	Yes	No	No	No
Canis lupus	Yes	No	No	No

As nouns, gray wolf and Canis lupus are synonyms defined as:

gray wolf and Canis lupus: a wolf with a brindled grey coat living in forested northern regions of North America

Other synonyms of gray wolf include grey wolf, timber wolf.

gray wolf (noun)	Canis lupus (noun)
a wolf with a brindled grey coat living in forested northern regions of North America	a wolf with a brindled grey coat living in forested northern regions of North America