67 entries under proper topic. ×
| formal(adjective, ordinary, usual, normal) | |
| authoritative(adjective, good, sound, correct, right) | |
| established(adjective, sound, customary, accepted) | |
| sanctioned(adjective, sound, true, accepted) | |
| legitimate(adjective, sound, right, straight) | |
| true(adjective, sound, honest, straight) | |
| legal(adjective, good, sound, correct, right) | |
| approved(adjective, sound, accepted, traditional) | |
| orthodox(adjective, correct, fair, truth) | |
| recognized(adjective, sound, correct, right) | |
| bona fide(expression, adjective, honest, genuine) | |
| regular(adjective, correct, exact, common) | |
| ceremonial(adjective, strict, established, traditional) | |
| ceremonious(adjective, strict, customary, established) | |
| solemn(adjective, strict, traditional, ritual) | |
| accepted(adjective, sound, correct, right, honest) | |
| judicial(adjective, court, valid, justice) | |
| lawful(adjective, good, sound, correct, right) | |
| befitting(correct, fair, customary, lawful) | |
| canonical(adjective, sound, reliable, accepted) |
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| APA | Smart Define. (2015). official thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/official/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "official thesaurus" https://smartdefine.org/official/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, official thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/official/thesaurus/synonyms>. |
| MLA | Smart Define. "official thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/official/thesaurus/synonyms> |