343 entries under adjective topic. ×

4
resolved
4
unfaltering
4
vigilant(attentive, vigilant)
3
unflinching
3
committed(work, strain, firmness, resolute)
3
deliberate
3
elaborate(precise, thorough, meticulous)
3
exact(thorough, meticulous, painstaking)
3
plugging
3
priggish(precise, thorough, meticulous, fastidious)
3
productive(work, strain, firmness, labour)
3
punctual(thorough, meticulous, painstaking)
3
serious(thoughtful, resolute, practical, controlled)
3
severe(strong, powerful, penetrating, fastidious)
3
sharp(strong, powerful, attentive, penetrating)
3
strict(careful, thorough, meticulous, vigilant)
3
strong-willed(resolute, tenacious)
3
thoughtful(serious, reflective, vigilant)
3
tough(difficult, careful, resolute, thorough)
3
true(certain, careful, resolute, reliable)
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APASmart Define. (2015). diligent thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/diligent/thesaurus/synonyms
ChicagoSmart Define. 2015. "diligent thesaurus" https://smartdefine.org/diligent/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, diligent thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/diligent/thesaurus/synonyms>.
MLASmart Define. "diligent thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/diligent/thesaurus/synonyms>