barking deer vs muntjac

barking deer and muntjac both are nouns.

Word	Noun	Adjective	Verb	Adverb
barking deer	Yes	No	No	No
muntjac	Yes	No	No	No

As nouns, barking deer and muntjac are synonyms defined as:

barking deer and muntjac: small Asian deer with small antlers and a cry like a bark

barking deer (noun)	muntjac (noun)
small Asian deer with small antlers and a cry like a bark	small Asian deer with small antlers and a cry like a bark