featherweight vs prizefighter

featherweight and prizefighter both are nouns.

Word	Noun	Adjective	Verb	Adverb
featherweight	Yes	No	No	No
prizefighter	Yes	No	No	No

As nouns, prizefighter is a hypernym of featherweight; that is, prizefighter is a word with a broader meaning than featherweight:

Other hypernyms of featherweight include gladiator.

featherweight (noun)	prizefighter (noun)
A weight class division in combat sports, for fighters heavier than those in the bantamweight division and lighter than those in the lightweight division.	a professional boxer
a professional boxer who weighs between 123 and 126 pounds
weighs 126-139 pounds
an amateur boxer who weighs no more than 126 pounds