/ Thesaurus / I Synonyms of initiator Find synonyms for: Noun1. instigator, initiator, leaderusage: a person who initiates a course of actionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language