Oryx gazella vs oryx

Oryx gazella and oryx both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oryx gazella	Yes	No	No	No
oryx	Yes	No	No	No

As nouns, oryx is a hypernym of Oryx gazella; that is, oryx is a word with a broader meaning than Oryx gazella:

Oryx gazella: large South African oryx with a broad black band along its flanks
oryx: large African antelope with long straight nearly upright horns

Other hypernyms of Oryx gazella include pasang.

Oryx gazella (noun)	oryx (noun)
large South African oryx with a broad black band along its flanks	large African antelope with long straight nearly upright horns