6
conclusive(adjective, clear, sound, right, reasonable)
6
fair(adjective, good, clear, sound, correct)
6
in force(expression, adjective, idiom, strong, power)
6
incontrovertible(clear, reasonable, solid, certain, definite)
6
kosher(adjective, open, right, honest, sensible)
6
legit(adjective, good, clear, open, direct)
6
material(adjective, appropriate, solid, physical, true)
6
original(adjective, quality, sound, right, reasonable)
6
precise(adjective, good, correct, sensible, solid)
6
puissant(adjective, power, strength)
6
sufficient(adjective, good, direct, reasonable, fair)
6
veracious(adjective, open, honest, solid, true)
6
veritable(adjective, complete, correct, pure, true)
5
verifiable(adjective, clear, honest, true, sure)
5
efficient(adjective, power, sound, right, reasonable)
5
hard(adjective, strength, correct, severe, true)
5
indisputable(clear, certain, true, definite, real)
5
licit(adjective, reasonable, proper, just, legitimate)
5
mighty(adjective, strength)
5
sanctioned(adjective, honest, proper, accepted, established)
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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>