Breadcrumb Home > Thesaurus > P Synonyms of plummet Find synonyms for: Noun 1. plumb bob, plumb, plummet, bob usage: the metal bob of a plumb line Verb 1. plummet, plump, drop usage: drop sharply; "The stock market plummeted" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of plummet (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: rapacious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language