Synonyms|152Antonyms|5|Broader|1Narrower|0Related|55
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advocate(support, take, agree, underwrite)
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affirmation
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agree(verb, support, take, underwrite, assent)
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allege
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allow
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announce
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ante up(expression, sign, rubber-stamp)
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apostrophe
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appoint
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argue
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ascertain
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assert
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assign
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assurance
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authorize officially(expression, idiom)
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bear out(verb, expression, phrasal verb)
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bear witness(expression, idiom, evidence)
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beck
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bless(support, take, agree, underwrite)
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boost(support, take, agree, underwrite)
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APASmart Define. (2015). undersign thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/undersign/thesaurus/synonyms
ChicagoSmart Define. 2015. "undersign thesaurus" https://smartdefine.org/undersign/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, undersign thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/undersign/thesaurus/synonyms>.
MLASmart Define. "undersign thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/undersign/thesaurus/synonyms>