133 entries under investigate topic. ×

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figure(verb, view, examine, survey)
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follow a line of investigation(verb, expression, idiom, study)
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have a look at(verb, expression, idiom, inspect)
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make inquiries(verb, expression, study)
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notice(noun, verb, check, examine)
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penetrate
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pierce
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prod
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put out a feeler(expression, idiom, delve)
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sort out(verb, expression, view, examine)
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sound
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sound out(expression, delve)
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take a look at(verb, expression, idiom, inspect)
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APASmart Define. (2015). research thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/research/thesaurus/synonyms
ChicagoSmart Define. 2015. "research thesaurus" https://smartdefine.org/research/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, research thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/research/thesaurus/synonyms>.
MLASmart Define. "research thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/research/thesaurus/synonyms>