Synonyms|34Antonyms|3|Broader|0Narrower|0Related|9
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observing(adjective, attentive, observant)
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perpendicular(adjective, firm, straight, upright)
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raised(adjective, firm, straight, upright)
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respectful(adjective, attentive, observant)
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rigid(adjective, firm, straight, upright)
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standing(adjective, firm, straight, upright)
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stiff(adjective, firm, straight, upright)
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straight(adjective, upright)
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straight up(expression, adjective, firm, straight, upright)
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thoughtful(adjective, attentive, observant)
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upright(adjective, firm, straight, vertical)
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upstanding(adjective, firm, straight, upright)
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vertical(adjective, firm, straight, upright)
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watchful(adjective, attentive, observant)
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ChicagoSmart Define. 2013. "arrect thesaurus" https://smartdefine.org/arrect/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, arrect thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/arrect/thesaurus/synonyms>.
MLASmart Define. "arrect thesaurus" 18 May 2013. Web. 21 September 2026. <https://smartdefine.org/arrect/thesaurus/synonyms>