koudou vs antelope

koudou and antelope both are nouns.

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

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

koudou: either of two spiral-horned antelopes of the African bush
antelope: graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks

koudou (noun)	antelope (noun)
either of two spiral-horned antelopes of the African bush	graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks