| inquiring mind(noun, expression, regard, concern, interest) | |
| inquiringness(noun, regard, concern, interest, understand) | |
| inquisitiveness(noun, regard, concern, interest, understand) | |
| inspectorate | |
| interest(noun, regard, concern, understand, keenness) | |
| interestingness(noun, regard, concern, interest, understand) | |
| interrogating | |
| interrogatory(noun, review, request, judgment, query) | |
| intrusiveness(noun, regard, concern, interest, understand) | |
| investigation survey(expression, examination, survey) | |
| investigative | |
| investigative bureau | |
| joint discussion | |
| kite-flying | |
| legislative investigation | |
| lesson(noun, study, class, exercise, subject) | |
| lessons(noun, education, training, learning, schoolwork) | |
| lick(noun, check, struggle, approval, examination) | |
| logical analysis | |
| logical discussion |
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| APA | Smart Define. (2015). investigation thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/investigation/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "investigation thesaurus" https://smartdefine.org/investigation/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, investigation thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/investigation/thesaurus/synonyms>. |
| MLA | Smart Define. "investigation thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/investigation/thesaurus/synonyms> |