275 entries under adjective topic. ×

5
straining
5
tedious(dull, difficult, tender, boring)
5
wearing(dull, hard, tough, difficult)
4
awkward(difficult, demanding, problematic, grueling)
4
bothersome(hard, tough, severe, difficult)
4
challenging(hard, great, tough, severe)
4
cumbersome
4
disagreeable(tender, raw, painful, burning)
4
irksome(dull, difficulty, difficult, heavy)
4
murderous
4
precipitous(sharp, course, quick, rash)
4
saddening(sickness, ache, anguishes)
4
torturing
4
wrenching
3
acute
3
all-out
3
anguishing
3
annoying(dull, boring, painful, tedious)
3
besetting
3
bitter
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APASmart Define. (2016). arduous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms
ChicagoSmart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, arduous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>.
MLASmart Define. "arduous thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms>