fighter vs scrapper

fighter and scrapper both are nouns.

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

As nouns, fighter and scrapper are synonyms defined as:

Other synonyms of fighter include battler, belligerent, combatant.

fighter (noun)	scrapper (noun)
a high-speed military or naval airplane designed to destroy enemy aircraft in the air	someone who fights (or is fighting)
someone who fights (or is fighting)
someone who fights for a cause