/ Thesaurus / L Synonyms of lassen volcanic national park Find synonyms for: Noun1. Lassen Volcanic National Parkusage: a national park in California having mountains and volcanic lakes and hot springsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language