What is the noun form of fought?

The Word fight is a verb (fight, fights, fighting, fought), and a noun (fight, fights).

Verb: We don't want to fight about it.

Noun: Their fight lasted most of the night.

The adjective forms are the present participle of the verb, fighting (fighting Words), the past participle of the verb, fought (a fought battle), and fightable (a fightablepoint).