steenbok vs antelope

steenbok and antelope both are nouns.

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

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

steenbok: small plains antelope of southeastern Africa
antelope: graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks

steenbok (noun)	antelope (noun)
small plains antelope of southeastern Africa	graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks