Breadcrumb Home > Thesaurus > P Synonyms of pontoon Find synonyms for: Noun 1. pontoon, barge, flatboat, hoy, lighter usage: (nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge 2. pontoon, float usage: a float supporting a seaplane WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of pontoon (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: hagiography Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language