58 entries under tedious topic. ×

72
difficult(adjective, dull, hard, great, tough)
59
hard(adjective, dull, great, tough, easy)
56
laborious(adjective, dull, hard, great, tough)
52
tough(adjective, dull, hard, great, easy)
44
toilsome(adjective, hard, great, tough, difficulty)
42
burdensome(adjective, dull, hard, tough, severe)
39
severe(adjective, hard, tough, rough, difficult)
33
strenuous(adjective, dull, great, tough, severe)
30
operose(adjective, hard, tough, severe, difficulty)
29
rough(adjective, hard, great, tough, severe)
29
trying(adjective, dull, hard, tough, severe)
27
complex(adjective, hard, difficult, demanding)
27
oppressive(adjective, dull, hard, tough, severe)
26
complicated(adjective, hard, difficult, complex, awkward)
26
knotty(adjective, hard, severe, rough, difficult)
24
serious(adjective, hard, tough, easy, difficult)
22
exhausting(adjective, dull, hard, tough, difficult)
22
onerous(adjective, dull, hard, great, tough)
20
hefty(adjective, dull, hard, difficult, harsh)
18
fatiguing(adjective, dull, difficult, awkward, boring)
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APASmart Define. (2016). arduous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms
ChicagoSmart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, arduous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>.
MLASmart Define. "arduous thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms>