scrapper vs battler

scrapper and battler both are nouns.

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

As nouns, scrapper and battler are synonyms defined as:

Other synonyms of scrapper include belligerent, combatant, fighter.

scrapper (noun)	battler (noun)
someone who fights (or is fighting)	someone who fights (or is fighting)