gemsbok vs gemsbuck

gemsbok and gemsbuck both are nouns.

Word	Noun	Adjective	Verb	Adverb
gemsbok	Yes	No	No	No
gemsbuck	Yes	No	No	No

As nouns, gemsbok and gemsbuck are synonyms defined as:

gemsbok and gemsbuck: large South African oryx with a broad black band along its flanks

Other synonyms of gemsbok include Oryx gazella.

gemsbok (noun)	gemsbuck (noun)
large South African oryx with a broad black band along its flanks	large South African oryx with a broad black band along its flanks