289 entries under adjective topic. ×

10
weighty(clear, sound, right, reasonable)
9
well-founded(good, sound, right, reasonable)
9
absolute(clear, correct, honest, true)
9
confirmed(sound, right, reasonable, rational)
8
well-grounded(good, sound, right, reasonable)
8
compelling(clear, direct, sound, right)
8
exact(good, open, correct, honest)
8
forceful(clear, strong, power, direct)
8
forcible(strength, violent, important, powerful)
8
irrefutable(clear, sound, right, reasonable)
8
justifiable(reasonable, sensible, proper, logical)
8
meaningful(clear, significant, apt, effective)
7
binding(characteristic, sound, right, reasonable)
7
competent(good, power, suitable, acceptable)
7
reliable(good, clear, open, right)
7
adequate(good, power, suitable, acceptable)
6
rational(sound, reasonable, sensible, proper)
6
attested(sound, right, reasonable, rational)
6
authorized(fair, proper, legitimate, lawful)
6
certain(correct, honest, true, straight)
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APASmart Define. (2016). valid thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/valid/thesaurus/synonyms
ChicagoSmart Define. 2016. "valid thesaurus" https://smartdefine.org/valid/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, valid thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/valid/thesaurus/synonyms>.
MLASmart Define. "valid thesaurus" 31 March 2016. Web. 20 September 2026. <https://smartdefine.org/valid/thesaurus/synonyms>