2
forced
2
hairy(adjective, hard, severe, rough, difficult)
2
horrendous(adjective, painful)
2
inflaming(adjective, painful)
2
insufferable(adjective, painful)
2
intensive
2
irritated(adjective, tender, raw, painful, burning)
2
mean(adjective, hard, severe, rough, difficult)
2
miserable(adjective, painful)
2
odious(adjective, painful)
2
offensive(adjective, painful)
2
overwhelming
2
powerful
2
precipitate(adjective, sharp, course, quick, rash)
2
prickly(adjective, painful, burning, stinging, tingly)
2
stern(adjective, hard, severe, rough, difficult)
2
strong
2
tall(adjective, easy)
2
tender(adjective, raw, painful, burning, sore)
2
torturous
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APASmart Define. (2016). arduous thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms
ChicagoSmart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, arduous thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>.
MLASmart Define. "arduous thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms>