56 entries under penetrating topic. ×
| earnest(adjective, strong, enthusiastic, powerful, deep) | |
| energetic(adjective, work, strong, keen, intense) | |
| zealous(adjective, strong, keen, intense, energetic) | |
| eager(adjective, strong, keen, intense, energetic) | |
| hard(adjective, strong, difficult, powerful, tedious) | |
| strong(adjective, great, sharp, harsh, powerful) | |
| ardent(adjective, strong, passionate, powerful, deep) | |
| fervent(adjective, strong, passionate, powerful, deep) | |
| concentrated(adjective, strong, great, complete, sharp) | |
| keen(adjective, strong, intense, energetic, powerful) | |
| severe(adjective, strong, powerful, fastidious) | |
| sharp(adjective, strong, powerful, attentive) | |
| vehement(adjective, strong, passionate, powerful, deep) | |
| burning(strong, powerful, active, busy, occupied) | |
| deep(adjective, strong, great, powerful, forceful) | |
| fervid(adjective, strong, passionate, powerful, deep) | |
| forceful(strong, powerful) | |
| forcible(strong, powerful) | |
| passionate(adjective, strong, powerful, deep, ardent) | |
| supreme(strong, powerful) |
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| APA | Smart Define. (2015). diligent thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/diligent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "diligent thesaurus" https://smartdefine.org/diligent/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, diligent thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/diligent/thesaurus/synonyms>. |
| MLA | Smart Define. "diligent thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/diligent/thesaurus/synonyms> |