rebutter vs rebuttal

rebutter and rebuttal both are nouns.

Word	Noun	Adjective	Verb	Adverb
rebutter	Yes	No	No	No
rebuttal	Yes	No	No	No

As nouns, rebutter and rebuttal are synonyms defined as:

rebutter and rebuttal: (law) a pleading by the defendant in reply to a plaintiff's surrejoinder

rebutter (noun)	rebuttal (noun)
(law) a pleading by the defendant in reply to a plaintiff's surrejoinder	the speech act of refuting by offering a contrary contention or argument
a debater who refutes or disproves by offering contrary evidence or argument	(law) a pleading by the defendant in reply to a plaintiff's surrejoinder