80 entries under fair topic. ×

7
right(adjective, sound, reasonable, honest, sensible)
6
conceivable(adjective, reasonable, honest, acceptable)
6
just(adjective, adverb, good, sound, reasonable)
6
moderate(adjective, sound, reasonable, sensible)
6
reflective(adjective, sound, reasonable, honest, sensible)
5
impartial(adjective, sound, reasonable, honest, sensible)
5
legitimate(adjective, clear, sound, reasonable, honest)
5
probable(adjective, sound, reasonable, sensible, solid)
5
temperate(adjective, reasonable, moderate, honest, sensible)
4
consistent(adjective, clear, sound, reasonable, sensible)
4
feasible(adjective, reasonable, honest, sensible)
4
objective(adjective, hard, sound, reasonable, honest)
4
possible(adjective, reasonable, sensible, solid)
4
proper(adjective, good, reasonable, honest, sensible)
3
apt(adjective, clear, reasonable, smart, bright)
3
controlled(adjective, reasonable, moderate, honest, sensible)
3
equitable(adjective, sound, reasonable, moderate, honest)
2
advisable(adjective, good, sound, reasonable, sensible)
2
imaginable(adjective, reasonable, honest, acceptable)
2
modest(adjective, reasonable, moderate, honest, sensible)
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APASmart Define. (2016). rational thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rational/thesaurus/synonyms
ChicagoSmart Define. 2016. "rational thesaurus" https://smartdefine.org/rational/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, rational thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rational/thesaurus/synonyms>.
MLASmart Define. "rational thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/rational/thesaurus/synonyms>