1,116 entry under adjective topic. ×

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coherent(clear, simple, sharp, rational)
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crystal clear(expression, clear, see, exact)
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frugal(quality, slight, thin, delicate)
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fundamental(simple, pure, straightforward, basic)
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gross(clear, flat, total, awful)
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perfect(simple, right, clean, big)
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pronounced(clear, see, sharp, bright)
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rude(poor, straightforward, blunt, incomplete)
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self-evident
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unobtrusive(calm, quiet, simple, soft)
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unquestionable(right, sharp, flat, true)
7
unrestrained(open, simple, warm, loving)
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usual(dull, simple, flat, honest)
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vanilla(dull, weak, simple, flat)
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vivid(clear, bright, exact, straightforward)
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workaday(simple, pure, common, ordinary)
6
categorical(clear, open, flat, honest)
6
conventional(simple, pure, common, ordinary)
6
crystalline(clear, simple, straightforward, precise)
6
essential(simple, pure, straightforward, basic)
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APASmart Define. (2016). plain thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/plain/thesaurus/synonyms
ChicagoSmart Define. 2016. "plain thesaurus" https://smartdefine.org/plain/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, plain thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/plain/thesaurus/synonyms>.
MLASmart Define. "plain thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/plain/thesaurus/synonyms>