brocket vs cervid

brocket and cervid both are nouns.

Word	Noun	Adjective	Verb	Adverb
brocket	Yes	No	No	No
cervid	Yes	No	No	No

As nouns, cervid is a hypernym of brocket; that is, cervid is a word with a broader meaning than brocket:

brocket: small South American deer with unbranched antlers
cervid: distinguished from Bovidae by the male's having solid deciduous antlers

Other hypernyms of brocket include deer.

brocket (noun)	cervid (noun)
small South American deer with unbranched antlers	distinguished from Bovidae by the male's having solid deciduous antlers
male red deer in its second year