Cervus elaphus canadensis vs elk

Cervus elaphus canadensis and elk both are nouns.

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

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

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

Other synonyms of Cervus elaphus canadensis include American elk, wapiti.

Cervus elaphus canadensis (noun)	elk (noun)
large North American deer with large much-branched antlers in the male	large northern deer with enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America
	common deer of temperate Europe and Asia
	large North American deer with large much-branched antlers in the male