bushbuck vs harnessed antelope

bushbuck and harnessed antelope both are nouns.

Word	Noun	Adjective	Verb	Adverb
bushbuck	Yes	No	No	No
harnessed antelope	Yes	No	No	No

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

bushbuck: antelope with white markings like a harness and twisted horns
harnessed antelope: any of several antelopes of the genus Tragelaphus having striped markings resembling a harness

bushbuck (noun)	harnessed antelope (noun)
antelope with white markings like a harness and twisted horns	any of several antelopes of the genus Tragelaphus having striped markings resembling a harness