"rebutters" in the noun sense
1. rebutter, disprover, refuter, confuter
a debater who refutes or disproves by offering contrary evidence or argument
2. rebutter, rebuttal
law) a pleading by the defendant in reply to a plaintiff's surrejoinder
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License