muntjac vs cervid

muntjac and cervid both are nouns.

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

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

muntjac: small Asian deer with small antlers and a cry like a bark
cervid: distinguished from Bovidae by the male's having solid deciduous antlers

Other hypernyms of muntjac include deer.

muntjac (noun)	cervid (noun)
small Asian deer with small antlers and a cry like a bark	distinguished from Bovidae by the male's having solid deciduous antlers