343 entries under adjective topic. ×

41
careful(thoughtful, serious, attentive, reliable)
34
hard-working(activity, work, keen, strain)
33
industrious(activity, work, strong, keen)
31
assiduous(activity, work, keen, strain)
30
tireless(work, strain, firmness, resolute)
25
sedulous(activity, work, strong, strain)
24
indefatigable(activity, resolute, persevering, tenacious)
23
attentive(careful, thoughtful, serious, attentive)
22
laborious(work, labour, persevering, tireless)
21
painstaking(activity, difficult, careful, precise)
19
conscientious(work, strain, careful, firmness)
19
persistent(resolute, industrious, persevering, tenacious)
18
earnest(strong, enthusiastic, powerful, deep)
17
hardworking(work, difficult, energetic, daring)
16
persevering(keen, difficult, intense, energetic)
15
energetic(work, strong, keen, intense)
14
busy(work, strong, keen, intense)
14
thorough(complete, total, careful, precise)
14
punctilious(precise, thorough, meticulous, fastidious)
13
steadfast(resolute, persevering, tenacious)
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APASmart Define. (2015). diligent thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/diligent/thesaurus/synonyms
ChicagoSmart Define. 2015. "diligent thesaurus" https://smartdefine.org/diligent/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, diligent thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/diligent/thesaurus/synonyms>.
MLASmart Define. "diligent thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/diligent/thesaurus/synonyms>