disorderern.
Etymology: formed as disorder v. + -er suffix1.Previous versions of the OED give the stress as: disˈorderer.
rare. Apparently only attested in dictionaries or glossaries.
1598 J. Florio Scorrettore, a spoiler, a marrer of anie thing, a disordrer.
This entry has not yet been fully updated (first published 1896; most recently modified version published online September 2021).