/ Thesaurus / M Synonyms of mount saint helens Find synonyms for: Noun1. Mount Saint Helens, Mount St. Helens, Mt. St. Helensusage: an active volcano in the Cascade Range in southwestern Washington; erupted violently in 1980 after 123 years of inactivityWordNet 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