| unformed | |
| urea | |
| usual(adjective, simple, moderate, plain, common) | |
| volatile(adjective, strong, hard, tough, flexible) | |
| adaptive | |
| agreeable(adjective, willing) | |
| bendy(adjective, soft, flexible, supple, pliable) | |
| buoyant(adjective, strong, hard, tough, flexible) | |
| celluloid | |
| charge card(noun, expression, idiom, credit, card) | |
| chemical(adjective, fake, artificial, made) | |
| clayey | |
| common(adjective, dull, moderate, poor, low) | |
| commonplace(adjective, dull, simple, moderate, plain) | |
| complaisant(docile, obedient, manageable) | |
| controllable(adjective, shy, meek, docile, obedient) | |
| conventional(simple, plain, common, natural, humble) | |
| cookie-cutter(adjective, characteristic, quality, regularity, commonplaceness) | |
| credit(noun, balance, trust, stock, plastics) | |
| crummy |
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| APA | Smart Define. (2015). plastic thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/plastic/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "plastic thesaurus" https://smartdefine.org/plastic/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, plastic thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/plastic/thesaurus/synonyms>. |
| MLA | Smart Define. "plastic thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/plastic/thesaurus/synonyms> |