- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
41 entries under reasonable topic. ×
| official(adjective, good, sound, correct, right) | |
| authentic(adjective, good, open, sound, correct) | |
| trustworthy(adjective, good, clear, sound, correct) | |
| true(adjective, good, clear, sound, correct) | |
| legitimate(adjective, good, sound, correct, right) | |
| strong(adjective, good, sound, right) | |
| accurate(adjective, good, open, sound, correct) | |
| lawful(adjective, good, sound, correct, right) | |
| confirmed(adjective, good, sound, right) | |
| legal(adjective, good, sound, correct, right) | |
| telling(adjective, strong, sound, energetic) | |
| cogent(adjective, strong, sound, energetic) | |
| determinative(adjective, sound, rational, decide) | |
| good(sound, right, rational, genuine) | |
| substantial(adjective, good, strong, sound, right) | |
| attested(adjective, good, sound, right) | |
| bona fide(expression, adjective, good, sound, correct) | |
| irrefutable(clear, sound, certain, rational) | |
| proven(adjective, sound, solid, proper) | |
| well-founded(good, sound, right, rational) |
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| APA | Smart Define. (2015). authoritative thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/authoritative/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "authoritative thesaurus" https://smartdefine.org/authoritative/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, authoritative thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/authoritative/thesaurus/synonyms>. |
| MLA | Smart Define. "authoritative thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/authoritative/thesaurus/synonyms> |