120 entries under solid topic. ×

7
true(adjective, open, smooth, correct, right)
6
precise(adjective, calm, smooth, correct, right)
6
settled(adjective, firm, determined, usual)
5
rigid(adjective, correct, exact, proper)
5
steadfast(adjective, dull, firm, determined)
5
unchangeable(adjective, set, firm, stable)
5
unqualified(adjective, complete, firm, steady)
4
certain(adjective, correct, reasonable, firm, sensible)
4
exact(adjective, calm, smooth, correct, right)
4
strict(adjective, correct, right, appropriate)
3
calm(adjective, smooth, flat, firm, plain)
3
careful(adjective, correct, exact, proper)
3
firm(noun, adjective, dull, complete)
3
just(adjective, correct, right, appropriate)
3
reliable(adjective, firm, exact, stable)
3
right(adjective, smooth, correct, flat, appropriate)
3
serene(adjective, calm, quiet, soft, gentle)
3
sure(adjective, reasonable, firm, sensible)
3
unfaltering(adjective, firm, steady, stable)
3
unfluctuating(adjective, calm, smooth, right, flat)
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APASmart Define. (2016). regular thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/regular/thesaurus/synonyms
ChicagoSmart Define. 2016. "regular thesaurus" https://smartdefine.org/regular/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, regular thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/regular/thesaurus/synonyms>.
MLASmart Define. "regular thesaurus" 23 March 2016. Web. 20 September 2026. <https://smartdefine.org/regular/thesaurus/synonyms>