Breadcrumb Home > Thesaurus > P Synonyms of polystyrene Find synonyms for: Noun 1. polystyrene, styrene, cinnamene, phenylethylene, vinylbenzene usage: a polymer of styrene; a rigid transparent thermoplastic; "expanded polystyrene looks like a rigid white foam and is used as packing or insulation" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of polystyrene (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