2
commonsensical(adjective, reason, sane)
2
compelling(sound, reasonable, rational)
2
constant(calm, strong, solid, steady, substantial)
2
correct(good, reasonable, proper, moral, valid)
2
deep-seated
2
definite(adjective, strong, easy, solid, certain)
2
determined(adjective, strong, easy, solid, certain)
2
etched
2
exact(correct, proper, moral)
2
fair(adjective, reasonable, valid, lawful, rightful)
2
forceful(adjective, strong, sound, tough, solid)
2
heavy(adjective, strong, sound, tough, solid)
2
judicious(adjective, reason, sane)
2
levelheaded(adjective, reason, sane)
2
persuasive(good, sound, right, reasonable, rational)
2
probable(adjective, reasonable, sensible, true, natural)
2
rightful(adjective, reasonable, valid, lawful, justified)
2
sagacious(adjective, reason, sane)
2
tight(adjective, good, strong, secure, reason)
2
tough(calm, strong, sound, solid, heavy)
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APASmart Define. (2016). well-founded thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/well-founded/thesaurus/synonyms
ChicagoSmart Define. 2016. "well-founded thesaurus" https://smartdefine.org/well-founded/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, well-founded thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/well-founded/thesaurus/synonyms>.
MLASmart Define. "well-founded thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/well-founded/thesaurus/synonyms>