gazelle vs antelope

gazelle and antelope both are nouns.

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

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

gazelle: small swift graceful antelope of Africa and Asia having lustrous eyes
antelope: graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks

gazelle (noun)	antelope (noun)
small swift graceful antelope of Africa and Asia having lustrous eyes	graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks