blackbuck vs antelope

blackbuck and antelope both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackbuck	Yes	No	No	No
antelope	Yes	No	No	No

As nouns, antelope is a hypernym of blackbuck; that is, antelope is a word with a broader meaning than blackbuck:

blackbuck: common Indian antelope with a dark back and spiral horns
antelope: graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks

blackbuck (noun)	antelope (noun)
common Indian antelope with a dark back and spiral horns	graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks