cruiserweight vs prizefighter

cruiserweight and prizefighter both are nouns.

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

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

Other hypernyms of cruiserweight include gladiator.

cruiserweight (noun)	prizefighter (noun)
A weight class division in combat sports, for fighters heavier than those in the middleweight division and lighter than those in the super heavyweight division.	a professional boxer
a professional boxer who weighs between 169 and 175 pounds