Plastic
Plastic adjective - Capable of being easily molded or modeled.
Usage example: Silly Putty is famous for being very plastic
Stiff
Stiff adjective - Incapable of or highly resistant to bending.
Usage example: use a stiff piece of paper for the project
Both words in one sentence
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Instead, one expert recommends holding a weapon in place with gloved fingertips and sliding a thin, stiff sheet of plastic beneath it.
Source: Series / Law & Order - Off Model: The character models look cheap and dated, with stiff, plastic-looking hair.
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Sex Bot: Cleo was built as one, but it's clear that her creator isn't very good at constructing; she's very patchwork and haphazard looking, with a stiff, plastic-looking face.
Source: Film / Automata
Cite this Source
Stiff and Plastic. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/plastic/stiff
Plastic & Stiff. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/plastic/stiff>.
Stiff or Plastic. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/plastic/stiff.
Google Ngram Viewer shows how "plastic" and "stiff" have occurred on timeline