saiga vs antelope

saiga and antelope both are nouns.

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

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

saiga: goat-like antelope of central Eurasia having a stubby nose like a proboscis
antelope: graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks

saiga (noun)	antelope (noun)
goat-like antelope of central Eurasia having a stubby nose like a proboscis	graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks