343 entries under adjective topic. ×
| rigorous | |
| thoroughgoing(thorough, meticulous, painstaking) | |
| vigorous(keen, energetic, lively, determined) | |
| absorbed(complete, total, whole, attentive) | |
| ambitious(work, energetic, daring, labour) | |
| concentrated(strong, great, complete, sharp) | |
| courageous(resolute, tenacious) | |
| decisive(resolute, tenacious) | |
| efficient(work, strain, firmness, labour) | |
| engaged(keen, intense, energetic, lively) | |
| enthusiastic(keen, intense, energetic, lively) | |
| finical | |
| hustling(energetic, active, daring, occupied) | |
| in-depth | |
| keen(strong, intense, energetic, powerful) | |
| observing | |
| persisting | |
| persnickety(thorough, meticulous, fastidious, painstaking) | |
| plodding(activity, work, labour, multitask) | |
| reliable(certain, careful, resolute, thorough) |
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| APA | Smart Define. (2015). diligent thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/diligent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "diligent thesaurus" https://smartdefine.org/diligent/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, diligent thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/diligent/thesaurus/synonyms>. |
| MLA | Smart Define. "diligent thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/diligent/thesaurus/synonyms> |