Plain
Mutual synonyms
How words are described
Both words in one sentence
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Cat Smile: The Sage of the Forest often uses it when he comes up with silly ideas or is just plain confused.
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Turkey always wears a plain white mask over his eyes, but a cat can't wear a mask—that would be silly.
Source: Brown Bag Mask - Really, it was just plain bad writing, which often tried to awkwardly marry together silly plots with the insistence that it was all Serious Business.
Cite this Source
Silly and Plain. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/plain/silly
Plain & Silly. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/plain/silly>.
Silly or Plain. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/plain/silly.
Google Ngram Viewer shows how "plain" and "silly" have occurred on timeline