/ Thesaurus / M Synonyms of msb Find synonyms for: Noun1. mutual savings bank, MSB, savings bankusage: a state-chartered savings bank owned by its depositors and managed by a board of trusteesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: abdicate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language