/ Thesaurus / P Synonyms of plump in Find synonyms for: Verb1. plump in, arrive, get, comeusage: arrive suddenly and unannounced; "He plumped in on a Sunday morning"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language