127 entries under solid topic. ×

6
horizontal(adjective, direct, smooth, right, flat)
6
inflexible(adjective, strong, smooth, tough, flat)
6
material(adjective, real, essential, basic)
6
physical(adjective, material, certain, substantial)
6
plumb(adjective, direct, smooth, right, flat)
6
punctilious(adjective, sound, correct, right, honest)
6
responsible(adjective, good, strong, honest, sensible)
6
rigorous(noun, adjective, correct, right, appropriate)
6
stable(adjective, good, strong, smooth, right)
6
true-blue(adjective, good, close, strong, open)
6
undeviating(adjective, strong, direct, smooth, right)
6
undistorted(adjective, close, smooth, correct, right)
5
close(adjective, correct, firm, honest)
5
tried(adjective, good, close, strong, correct)
5
unbroken(adjective, direct, smooth, right, flat)
4
careful(noun, good, strong, correct, honest)
4
concrete(adjective, correct, exact, physical)
4
continuous(adjective, direct, smooth, right, flat)
4
distinct(noun, adjective, correct, perfect)
4
explicit(noun, adjective, strong, correct, flat)
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APASmart Define. (2016). true thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/true/thesaurus/synonyms
ChicagoSmart Define. 2016. "true thesaurus" https://smartdefine.org/true/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, true thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/true/thesaurus/synonyms>.
MLASmart Define. "true thesaurus" 31 March 2016. Web. 21 September 2026. <https://smartdefine.org/true/thesaurus/synonyms>