343 entries under adjective topic. ×
| headstrong(resolute, tenacious) | |
| hearty(resolute, tenacious) | |
| immersed(involved, attentive, absorbed, occupied) | |
| implacable | |
| inexorable | |
| interested | |
| lively(keen, intense, energetic, vigorous) | |
| obdurate | |
| perspicacious | |
| plucky(resolute, tenacious) | |
| precise(fastidious, vigilant) | |
| provident | |
| prudent | |
| quick | |
| resourceful(energetic, daring, innovative, ingenious) | |
| rigid | |
| spirited(energetic, lively, daring, busy) | |
| spunky(resolute, tenacious) | |
| stern | |
| stickler(thorough, meticulous, painstaking) |
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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> |