79 entries under tough topic. ×

43
laborious(adjective, hard, great, difficulty)
41
arduous(adjective, hard, great, difficulty)
40
hard(adjective, great, difficulty, difficult)
37
difficult(adjective, hard, great, difficulty)
32
burdensome(adjective, hard, difficult, complex)
27
operose(adjective, hard, difficulty, difficult)
27
rough(adjective, hard, great, difficult)
27
severe(adjective, hard, difficult, harsh)
18
onerous(adjective, hard, great, difficulty)
17
strenuous(adjective, hard, great, severe)
17
uphill(adjective, hard, great, difficult)
12
wearisome(adjective, hard, severe, difficult)
11
heavy(adjective, severe, difficult, harsh)
11
troublesome(adjective, hard, severe, difficulty)
10
demanding(adjective, hard, severe, difficult)
10
formidable(adjective, severe, difficulty, difficult)
10
grueling(adjective, hard, severe, difficult)
10
wearying(adjective, rough, difficult, heavy)
9
tiring(adjective, hard, severe, rough)
7
effortful(adjective, hard, great, severe)
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APASmart Define. (2015). toilsome thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/toilsome/thesaurus/synonyms
ChicagoSmart Define. 2015. "toilsome thesaurus" https://smartdefine.org/toilsome/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, toilsome thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/toilsome/thesaurus/synonyms>.
MLASmart Define. "toilsome thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/toilsome/thesaurus/synonyms>