Alces alces vs deer

Alces alces and deer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alces alces	Yes	No	No	No
deer	Yes	No	No	No

As nouns, deer is a hypernym of Alces alces; that is, deer is a word with a broader meaning than Alces alces:

Alces alces: large northern deer with enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America
deer: distinguished from Bovidae by the male's having solid deciduous antlers

Other hypernyms of Alces alces include cervid.

Alces alces (noun)	deer (noun)
large northern deer with enormous flattened antlers in the male; called `elk' in Europe and `moose' in North America	distinguished from Bovidae by the male's having solid deciduous antlers