43 entries under reasonable topic. ×
| authoritative(adjective, good, sound, correct, right) | |
| legal(adjective, good, sound, correct, right) | |
| lawful(adjective, good, sound, correct, right) | |
| conclusive(adjective, sound, true, rational) | |
| good(sound, right, honest, pure) | |
| irrefutable(adjective, sound, rational, reliable) | |
| powerful(good, sound, right, rational) | |
| binding(sound, rational) | |
| confirmed(good, sound, right, proper) | |
| credible(adjective, good, sound, right) | |
| potent(good, sound, right, rational) | |
| right(adjective, good, sound, fair) | |
| substantial(good, sound, right, rational) | |
| trustworthy(adjective, good, sound, right) | |
| weighty(good, sound, right, rational) | |
| efficient(adjective, good, sound, right) | |
| just(good, sound, right, fair) | |
| justifiable(sound, proper, just, valid) | |
| pure(good, sound, right, real) | |
| sound(honest, pure, proper, real) |
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| APA | Smart Define. (2015). official thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/official/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "official thesaurus" https://smartdefine.org/official/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, official thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/official/thesaurus/synonyms>. |
| MLA | Smart Define. "official thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/official/thesaurus/synonyms> |