pronghorn vs prongbuck

pronghorn and prongbuck both are nouns.

Word	Noun	Adjective	Verb	Adverb
pronghorn	Yes	No	No	No
prongbuck	Yes	No	No	No

As nouns, pronghorn and prongbuck are synonyms defined as:

pronghorn and prongbuck: fleet antelope-like ruminant of western North American plains with small branched horns

Other synonyms of pronghorn include American antelope, Antilocapra americana, pronghorn antelope.

pronghorn (noun)	prongbuck (noun)
fleet antelope-like ruminant of western North American plains with small branched horns	fleet antelope-like ruminant of western North American plains with small branched horns