Plastic and Unalterable

Opposite meaning words

Plastic adjective - Capable of being easily molded or modeled.

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Unalterable is an antonym for plastic.

Unalterable adjective - Not capable of changing or being changed.

Usage example: the rules of the game are unalterable, regardless of who is playing

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Plastic is an antonym for unalterable.

Nearby Words: unaltered, unalterably

Cite this Source

Unalterable and Plastic. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/plastic/unalterable

Plastic & Unalterable. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/plastic/unalterable>.

Unalterable or Plastic. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/plastic/unalterable.

Google Ngram Viewer shows how "plastic" and "unalterable" have occurred on timeline