90 entries under investigate topic. ×
| assess(verb, check, examine, question) | |
| feel around(expression, dig, explore, research) | |
| give someone the third degree(verb, idiom, question) | |
| give something the once-over(verb, expression, idiom, study, check) | |
| penetrate(dig, explore, research, delve) | |
| pierce(dig, explore, research, delve) | |
| prod(dig, explore, research, delve) | |
| put out a feeler(expression, idiom, dig, explore) | |
| sound(dig, explore, research, delve) | |
| verify(dig, explore, research, delve) |
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| APA | Smart Define. (2016). interrogate thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/interrogate/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "interrogate thesaurus" https://smartdefine.org/interrogate/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, interrogate thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/interrogate/thesaurus/synonyms>. |
| MLA | Smart Define. "interrogate thesaurus" 27 March 2016. Web. 28 September 2026. <https://smartdefine.org/interrogate/thesaurus/synonyms> |