Scrapper
Part of speech: noun
Definition: A person who disposes of scraps. A person who fights doggedly, who exhibits indomitable will.
Fighter
Part of speech: noun
Definition: A person who fights, a combatant.A warrior; fighting soldier.A pugnacious, competitive person.A class of fixed-wing aircraft whose primary purpose is that of shooting down other aircraft. Some of these (Fighter-Attack or Attack aircraft) also have a secondary purpose of attacking ground targets.A boxer or participant in any martial art
Example sentence: I'm a lover, not a fighter, but I'll fight if I have to.