Synonyms|8Antonyms|2|Broader|0Narrower|0Related|10
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approach unnoticed(verb, expression, surprise)
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catch unawares(verb, expression, surprise)
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come up behind(verb, expression, idiom, surprise)
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creep up on(verb, expression, idiom, surprise)
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sneak up on(expression, idiom, surprise)
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steal up on(verb, expression, idiom, surprise)
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surprise
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take by surprise(verb, expression, idiom, surprise)
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APASmart Define. (1970). come up on thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/come_up_on/thesaurus/synonyms
ChicagoSmart Define. 1970. "come up on thesaurus" https://smartdefine.org/come_up_on/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 1970, come up on thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/come_up_on/thesaurus/synonyms>.
MLASmart Define. "come up on thesaurus" 1 January 1970. Web. 21 September 2026. <https://smartdefine.org/come_up_on/thesaurus/synonyms>