| grueling(adjective, tough, difficult, awkward, grim) | |
| hassle(noun, challenge, struggle, match, examination) | |
| heavy(adjective, tough, severe, difficult, violent) | |
| heuristic | |
| hit-or-miss | |
| hit and miss(expression, idiom) | |
| identification(noun, connection, link, association, relation) | |
| indagative | |
| inspecting | |
| inspection | |
| inspectional | |
| inspectorial | |
| interrogation | |
| intractable(tough, problematic, trying) | |
| investigational | |
| investigatory | |
| juxtaposition(noun, connection, link, association, relation) | |
| laddering | |
| learn | |
| leavening |
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| APA | Smart Define. (2015). testing thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/testing/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "testing thesaurus" https://smartdefine.org/testing/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, testing thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/testing/thesaurus/synonyms>. |
| MLA | Smart Define. "testing thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/testing/thesaurus/synonyms> |