tumulter

From tumult +‎ -er.

tumulter (plural tumulters)

1. (obsolete) A maker of tumults.
   • 1670, John Milton, “(please specify the page)”, in The History of Britain, that Part Especially now Call’d England. […], London: […] J[ohn] M[acock] for James Allestry, […] , →OCLC:

     He severely punished the tumulters.

tumulter c

1. indefinite plural of tumult