Cervus elaphus canadensis vs American elk

Cervus elaphus canadensis and American elk both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cervus elaphus canadensis	Yes	No	No	No
American elk	Yes	No	No	No

As nouns, Cervus elaphus canadensis and American elk are synonyms defined as:

Cervus elaphus canadensis and American elk: large North American deer with large much-branched antlers in the male

Other synonyms of Cervus elaphus canadensis include elk, wapiti.

Cervus elaphus canadensis (noun)	American elk (noun)
large North American deer with large much-branched antlers in the male	large North American deer with large much-branched antlers in the male
	common deer of temperate Europe and Asia