35 entries under difficult topic. ×

19
ponderous(adjective, hard, complex)
19
profound(adjective, hard, complex)
19
weighty(adjective, hard, complex)
18
ambitious(adjective, hard, complex)
18
grinding(adjective, hard, complex)
18
rugged(adjective, hard, complex)
18
unbearable(adjective, hard, complex)
8
heavy(adjective, hard, tedious, demanding)
6
harsh(adjective, hard, persistent, demanding)
6
strenuous(adjective, hard, demanding, exhausting)
6
tiring(adjective, hard, tedious, demanding)
5
demanding(adjective, hard, strenuous, exhausting)
5
exhausting(adjective, hard, demanding, strenuous)
4
fatiguing(adjective, hard, demanding, exhausting)
2
uphill(adjective, laborious)
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APASmart Define. (2015). punishing thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/punishing/thesaurus/synonyms
ChicagoSmart Define. 2015. "punishing thesaurus" https://smartdefine.org/punishing/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, punishing thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/punishing/thesaurus/synonyms>.
MLASmart Define. "punishing thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/punishing/thesaurus/synonyms>