| further | |
| impartial(adjective, objective) | |
| inadmissible(adjective, extraneous) | |
| inapplicable(adjective, extraneous) | |
| inappropriate(adjective, extraneous) | |
| non-subjective(adjective, objective) | |
| nonessential(adjective, extraneous) | |
| observable | |
| obvious | |
| on the surface(expression, idiom, surface, shallow, apparent) | |
| open-air(separate, out, outside, external, foreign) | |
| ostensible(adjective, surface, shallow, apparent, noticeable) | |
| other(adjective, extraneous) | |
| out-of-the-way | |
| outdoors | |
| outerer | |
| outlandish(adjective, extraneous) | |
| outstanding | |
| outward-facing | |
| outwardly |
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| APA | Smart Define. (2015). outer thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/outer/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "outer thesaurus" https://smartdefine.org/outer/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, outer thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/outer/thesaurus/synonyms>. |
| MLA | Smart Define. "outer thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/outer/thesaurus/synonyms> |