166 entries under adjective topic. ×

34
diligent(activity, work, keen, strain)
31
industrious(activity, work, keen, strain)
26
sedulous(activity, work, strain, difficult)
20
tireless(work, strain, active, firmness)
19
careful(thorough, meticulous, painstaking)
18
painstaking(activity, complete, energetic, vigorous)
16
hard-working(activity, work, strain, firmness)
15
laborious(work, labour, diligent, hardworking)
15
attentive(deliberate, active, alert, careful)
13
indefatigable(activity, untiring)
13
persevering(keen, difficult, intense, energetic)
12
busy(work, keen, intense, energetic)
11
untiring
11
conscientious(work, tough, strain, exact)
11
persistent
11
scrupulous(careful, thorough, meticulous, painstaking)
11
active(activity, keen, smart, difficult)
10
studious(careful, thoughtful, serious, considerate)
10
unflagging(persistent, continuous)
9
constant
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APASmart Define. (2015). assiduous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/assiduous/thesaurus/synonyms
ChicagoSmart Define. 2015. "assiduous thesaurus" https://smartdefine.org/assiduous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, assiduous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/assiduous/thesaurus/synonyms>.
MLASmart Define. "assiduous thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/assiduous/thesaurus/synonyms>