| conscionable(adjective, thorough, meticulous, painstaking) | |
| continuing | |
| dauntless(adjective, resolute, tenacious) | |
| dedicated(adjective, resolute) | |
| demanding(adjective, fastidious) | |
| detailed | |
| discerning(adjective, fastidious) | |
| dutiful | |
| dynamic | |
| fascinated(adjective, involved, attentive, absorbed, occupied) | |
| fast | |
| fraught | |
| fussbudget(adjective, thorough, meticulous, painstaking) | |
| grind(adjective, informal, persevering) | |
| guarded(adjective, vigilant) | |
| headstrong(adjective, resolute, tenacious) | |
| hearty(adjective, resolute, tenacious) | |
| immersed(adjective, involved, attentive, absorbed, occupied) | |
| implacable(adjective, resolute) | |
| inexorable(adjective, resolute) |
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| APA | Smart Define. (2015). diligent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/diligent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "diligent thesaurus" https://smartdefine.org/diligent/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, diligent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/diligent/thesaurus/synonyms>. |
| MLA | Smart Define. "diligent thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/diligent/thesaurus/synonyms> |