Breadcrumb Home > Thesaurus > P Synonyms of plonk down Find synonyms for: Verb1. plonk down, plump down, plank down, dropusage: drop heavilyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: taradiddle Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language