scrapper vs gladiator

scrapper and gladiator both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrapper	Yes	No	No	No
gladiator	Yes	No	No	No

As nouns, gladiator is a hyponym of scrapper; that is, gladiator is a word with a more specific, narrower meaning than scrapper:

scrapper: someone who fights (or is fighting)
gladiator: (ancient Rome) a professional combatant or a captive who entertained the public by engaging in mortal combat

scrapper (noun)	gladiator (noun)
someone who fights (or is fighting)	(ancient Rome) a professional combatant or a captive who entertained the public by engaging in mortal combat
	a professional boxer