/ Thesaurus / S Synonyms of secessionism Find synonyms for: Noun1. secessionism, doctrine, philosophy, philosophical system, school of thought, ismusage: a doctrine that maintains the right of secessionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language