156 entries under adjective topic. ×

11
painful(hard, tough, severe, difficult)
11
taxing(hard, difficult, harsh, heavy)
11
trying(dull, hard, tough, difficult)
11
weighty(hard, difficult, harsh, heavy)
10
exhausting(dull, hard, tough, difficult)
10
wearying(dull, difficult, awkward, boring)
9
exigent(difficult, harsh, heavy, demanding)
9
fatiguing(dull, difficult, awkward, boring)
9
vexatious(dull, severe, difficult, boring)
9
wearisome(dull, tough, severe, difficult)
8
bothersome(hard, tough, severe, difficult)
8
ponderous(difficult, heavy, cumbersome)
8
rugged(hard, tough, severe, rough)
8
tiring(dull, tough, difficult, awkward)
8
uphill(great, tough, severe, difficult)
7
crushing(difficult, heavy, troublesome, arduous)
7
effortful(great, tough, rough, difficult)
7
gruelling
6
backbreaking(hard, difficult, heavy, cruel)
6
distressing(hard, severe, rough, difficult)
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APASmart Define. (2015). onerous thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/onerous/thesaurus/synonyms
ChicagoSmart Define. 2015. "onerous thesaurus" https://smartdefine.org/onerous/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, onerous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/onerous/thesaurus/synonyms>.
MLASmart Define. "onerous thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/onerous/thesaurus/synonyms>