/ Thesaurus / M Synonyms of mount pinatubo Find synonyms for: Noun1. Pinatubo, Mount Pinatubousage: a volcano on Luzon to the northwest of Manila; erupted in 1991 after 600 years of dormancyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language