You searched for: “assentor”
assenter, assentor (s) (noun); assenters; assentors (pl)
Those who agree, cooperate with, or approve of an action or a plan: Most of the parents were assenters to the decision of the school to delay the beginning of classes by one hour each day on a regular schedule.

All of the students were assentors to the plans for the dance on Saturday.

This entry is located in the following units: -or; -our (primarily British) (page 2) senso-, sens-, sensi-, sensori-, sent- (page 1)