unseater means someone who unseats (in various senses).
Among words judged in Lexicurio's Arena, unseater ranks #4,399 of 13,180 for Qualifying.
Etymology
From unseat + -er.
noun
- Someone who unseats (in various senses).“Messiah is a debatable word, but an element in it has always been that of political leader, unseater of the powers that be.”