182 entries under reasonable topic. ×

9
sensible(adjective, proper, regular, authentic)
8
admissible(adjective, consideration, authentic, able)
8
allowable(adjective, proper, permission, valid)
8
good(adjective, sound, correct, right)
7
authoritative(adjective, good, sound, correct, right)
7
consistent(adjective, clear, sensible, normal)
6
cogent(adjective, clear, sound, sensible)
6
kosher(noun, adjective, good, clear, open)
6
sincere(adjective, good, sound, correct, right)
6
well-founded(adjective, good, sound, right)
5
acceptable(adjective, honest, fair, proper)
5
defensible(adjective, sound, rational, legal)
5
rational(adjective, clear, sound, honest)
5
trustworthy(adjective, good, open, sound, correct)
4
equitable(adjective, good, correct, right)
4
normal(adjective, correct, right, appropriate)
4
original(adjective, good, sound, right)
4
solid(good, sound, right, material)
4
substantial(good, sound, right, material)
4
warrantable(proper, just, valid, legal)
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APASmart Define. (2016). legitimate thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/legitimate/thesaurus/synonyms
ChicagoSmart Define. 2016. "legitimate thesaurus" https://smartdefine.org/legitimate/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, legitimate thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/legitimate/thesaurus/synonyms>.
MLASmart Define. "legitimate thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/legitimate/thesaurus/synonyms>