237 entries under adjective topic. ×

14
uphill(hard, great, tough, easy)
13
formidable(tough, severe, difficulty, rough)
13
sedulous(work, labour, assiduous, hardworking)
12
gruelling
12
wearying(dull, difficult, awkward, boring)
11
exacting(dull, hard, tough, severe)
10
grueling(hard, tough, severe, difficult)
10
hard-working(work, labour, painstaking, multitask)
10
tiresome(dull, hard, difficult, heavy)
9
laboured
9
strained(hard, difficult, exertion)
8
effortful(hard, great, tough, rough)
8
painstaking
8
wearing(dull, hard, difficult, awkward)
7
busy(work, labour, multitask)
7
forced(hard, difficult)
7
labored(hard, great, tough, rough)
7
tedious(dull, hard, difficult, tender)
6
Herculean(strong, hard, tough, severe)
6
energetic(work, labour, multitask)
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APASmart Define. (2016). laborious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/laborious/thesaurus/synonyms
ChicagoSmart Define. 2016. "laborious thesaurus" https://smartdefine.org/laborious/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, laborious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/laborious/thesaurus/synonyms>.
MLASmart Define. "laborious thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/laborious/thesaurus/synonyms>