addax vs antelope

addax and antelope both are nouns.

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

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

addax: large antelope with lightly spiraled horns of desert regions of northern Africa
antelope: graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks

addax (noun)	antelope (noun)
large antelope with lightly spiraled horns of desert regions of northern Africa	graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks