Cervus vs elk

Cervus and elk both are nouns.

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

Cervus (noun)	elk (noun)
the type genus of the Cervidae	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