Synonyms|175Antonyms|74|Broader|3Narrower|7Related|300

67 entries under rational topic. ×

2
impregnable(adjective, sound, reasonable, safety)
2
valid(adjective, sound, reasonable, justified)
1
authoritative(adjective, sound, reasonable)
1
credible(adjective, sound, reasonable, conceivable)
1
official(adjective, sound, reasonable)
1
solid(sound, reasonable)
1
viable(adjective, sound, reasonable, conceivable)
0
accurate(sound, reasonable)
0
attested(sound, reasonable)
0
authentic(sound, reasonable)
0
binding(sound, reasonable)
0
bona fide(expression, sound, reasonable)
0
cogent(sound, reasonable)
0
compelling(sound, reasonable)
0
conclusive(sound, reasonable)
0
confirmed(sound, reasonable)
0
convincing(sound, reasonable)
0
determinative(sound, reasonable)
0
efficacious(sound, reasonable)
0
efficient(sound, reasonable)
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ChicagoSmart Define. 2016. "defensible thesaurus" https://smartdefine.org/defensible/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, defensible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/defensible/thesaurus/synonyms>.
MLASmart Define. "defensible thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/defensible/thesaurus/synonyms>