Synonyms|75Antonyms|38|Broader|0Narrower|0Related|33
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unfortunatly
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abject
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accursed
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adversely
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adversity
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afflictively
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as luck would have it(expression, idiom, adverb, unfortunately)
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calamitously
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direly
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doom
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dreadfully
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drearily
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fatally
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foolishly
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haplessly(adverb, unfortunately)
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inadvisedly
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inauspiciously(adverb, unfortunately)
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inconveniently
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ineffectively
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inexcusably
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APASmart Define. (2015). regrettably thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/regrettably/thesaurus/synonyms
ChicagoSmart Define. 2015. "regrettably thesaurus" https://smartdefine.org/regrettably/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, regrettably thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/regrettably/thesaurus/synonyms>.
MLASmart Define. "regrettably thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/regrettably/thesaurus/synonyms>