| straightforward | |
| straightforwards | |
| straightly | |
| successively | |
| synchronized | |
| traditionalist | |
| trim(adjective, calm, smooth, flat, plain) | |
| trimmed(adjective, calm, smooth, flat, plain) | |
| unanimously | |
| undetermined(adjective, unsettled, incomplete, imminent, undecided) | |
| undeviatingly | |
| undistorted(adjective, direct, smooth, solid, short) | |
| unfluctuating(adjective, calm, smooth, flat, plain) | |
| uniform(adjective, calm, smooth, flat, plain) | |
| unsettled(adjective, incomplete, imminent, undecided, pendent) | |
| unswervingly | |
| unveeringly | |
| up in the air(expression, adjective, idiom, unsettled, imminent) | |
| uptight | |
| waiting(adjective, set, complete, ready, hesitant) |
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| APA | Smart Define. (2015). in line thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/in_line/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "in line thesaurus" https://smartdefine.org/in_line/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, in line thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/in_line/thesaurus/synonyms>. |
| MLA | Smart Define. "in line thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/in_line/thesaurus/synonyms> |