| idea(noun, order, view, determination, conclusion) | |
| identification | |
| indagation | |
| induction | |
| inference(noun, order, view, determination, conclusion) | |
| inquest(noun, order, view, determination, conclusion) | |
| inquisition(noun, order, view, determination, conclusion) | |
| inspecting | |
| integrating(verb, ordering) | |
| interrogation(noun, search, race, chase) | |
| investigating | |
| investigative bureau | |
| judgment(noun, decision, sentence, scrutiny, verdict) | |
| leaching | |
| legislative investigation | |
| legwork | |
| lixiviation | |
| long hard look(noun, expression, idiom, study, review) | |
| look-see(noun, search, race, chase, scrutiny) | |
| maintaining(verb, ordering) |
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| APA | Smart Define. (2015). sifting thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sifting/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sifting thesaurus" https://smartdefine.org/sifting/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, sifting thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sifting/thesaurus/synonyms>. |
| MLA | Smart Define. "sifting thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/sifting/thesaurus/synonyms> |