58 entries under tedious topic. ×

16
troublesome(adjective, hard, tough, difficulty, difficult)
15
demanding(adjective, dull, hard, tough, severe)
14
tiring(adjective, dull, tough, difficult, awkward)
13
formidable(adjective, tough, severe, difficulty, rough)
13
heavy(adjective, dull, tough, severe, rough)
10
exacting(adjective, dull, hard, tough, severe)
10
wearying(adjective, dull, difficult, awkward, boring)
9
wearisome(adjective, dull, tough, severe, difficult)
7
effortful(adjective, hard, great, tough, rough)
5
irritating(adjective, dull, tough, severe, boring)
5
labored(adjective, hard, great, tough, rough)
5
wearing(adjective, dull, hard, tough, difficult)
4
irksome(adjective, dull, difficulty, difficult, heavy)
3
annoying(adjective, dull, boring, painful)
2
abstruse(adjective, hard, fancy, difficult, complex)
2
vexatious(adjective, dull, difficult, tender, boring)
1
bit much(expression, dull, irritating, exhausting)
1
boresome(adjective, dull, boring, tired)
1
diligent(adjective, difficult, protracted)
1
drag(adjective, dull, boring, tired)
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APASmart Define. (2016). arduous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms
ChicagoSmart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, arduous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>.
MLASmart Define. "arduous thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms>