| course(noun, study, class, exercise, subject) | |
| court-martial | |
| cramming(noun, study, class, exercise, subject) | |
| cross-interrogatory | |
| cross-question | |
| debate(noun, study, class, exercise, subject) | |
| debating point | |
| decree(noun, order, view, determination, conclusion) | |
| deduction(noun, order, view, determination, conclusion) | |
| delve | |
| department of investigation(expression, idiom) | |
| detective work | |
| determination(noun, order, view, conclusion, resolution) | |
| diagnosis(study, check, review, test, analysis) | |
| disquisition(noun, review, investigation, into, autopsy) | |
| dissection(noun, study, check, review, examination) | |
| division(noun, study, review, examination, investigation) | |
| doubt | |
| dry run(noun, expression, study, check, exercise) | |
| dubious |
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| APA | Smart Define. (2015). inquiry thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/inquiry/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "inquiry thesaurus" https://smartdefine.org/inquiry/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, inquiry thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/inquiry/thesaurus/synonyms>. |
| MLA | Smart Define. "inquiry thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/inquiry/thesaurus/synonyms> |