118 entries under idiom topic. ×

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give your word(verb, expression, promise, swear)
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go over big(expression, do, serve, suffice)
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go steady
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have know(expression, belief)
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hit the spot(expression, do, serve, suffice)
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i' faith(expression, affirmation)
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in all conscience(expression, affirmation)
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in earnest(expression, affirmation)
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in fact(expression, affirmation)
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in sadness(expression, affirmation)
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in sober sadness(expression, affirmation)
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in truth(expression, affirmation)
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keep in line
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make a hit(expression, do, serve, suffice)
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make an affidavit(expression, affirmation)
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make oath(expression, affirmation)
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make sure that
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of a truth(expression, affirmation)
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pass inspection
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persuade oneself(expression, belief)
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APASmart Define. (2015). assure thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/assure/thesaurus/synonyms
ChicagoSmart Define. 2015. "assure thesaurus" https://smartdefine.org/assure/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, assure thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/assure/thesaurus/synonyms>.
MLASmart Define. "assure thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/assure/thesaurus/synonyms>