77 entries under spoil topic. ×

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invalidate(verb, cancel, reverse, negate)
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invert(verb, change, disturb, overturn)
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mar(cancel, invalidate, negate, nullify)
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negate(cancel, invalidate, nullify)
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neutralize(cancel, invalidate, negate, nullify)
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quash(cancel, invalidate, negate, nullify)
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queer(cancel, invalidate, negate, nullify)
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raze(verb, cancel, reverse, invalidate)
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ruin(verb, upset, cancel, reverse)
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screw up(expression, upset, disturb, cancel)
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skin(cancel, invalidate, negate, nullify)
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stymie(cancel, invalidate, negate, nullify)
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tilt(verb, change, disturb, overturn)
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unbuild(cancel, invalidate, negate, nullify)
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upturn(verb, change, disturb, overturn)
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vitiate(cancel, invalidate, negate, nullify)
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wreck(verb, upset, ruin, cancel)
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APASmart Define. (2015). unsettle thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unsettle/thesaurus/synonyms
ChicagoSmart Define. 2015. "unsettle thesaurus" https://smartdefine.org/unsettle/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, unsettle thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unsettle/thesaurus/synonyms>.
MLASmart Define. "unsettle thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/unsettle/thesaurus/synonyms>