148 entries under difficult topic. ×

3
complicated(adjective, hard, tough, severe, rough)
3
labored(adjective, hard, great, tough, rough)
3
vehement(adjective, intense, energetic, lively)
3
wicked
2
bothersome(adjective, tough, severe, awkward)
2
burning(adjective, vigorous, stressful)
2
cantankerous(adjective, energetic, antagonistic, aggressive)
2
challenging(adjective, great, tough, severe)
2
cumbersome
2
delicate
2
fiery(adjective, vigorous, stressful)
2
grinding(adjective, tough, severe, rough)
2
hairy(adjective, hard, severe, rough)
2
harrowing(adjective, unpleasant, grim, savage)
2
harsh
2
high-pressure
2
impassioned(adjective, vigorous, stressful)
2
impetuous
2
intricate(adjective, tough, severe, awkward)
2
not easy(expression, tough, severe, painful)
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APASmart Define. (2016). strenuous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/strenuous/thesaurus/synonyms
ChicagoSmart Define. 2016. "strenuous thesaurus" https://smartdefine.org/strenuous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, strenuous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/strenuous/thesaurus/synonyms>.
MLASmart Define. "strenuous thesaurus" 1 April 2016. Web. 23 September 2026. <https://smartdefine.org/strenuous/thesaurus/synonyms>