123 entries under hard topic. ×

23
thorny(adjective, difficult, complex)
22
operose(adjective, difficult, complex)
22
serious(adjective, bad, difficult, offensive)
22
toilsome(adjective, difficult, complex)
21
grave(adjective, difficult, complex)
21
heartrending(adjective, difficult, complex)
21
rough(adjective, bad, difficult, offensive)
21
sticky(adjective, difficult, complex, embarrassing)
20
complex(adjective, difficult)
20
knotty(adjective, difficult, complex)
20
problematic(adjective, difficult, complex)
20
stressful(adjective, difficult, complex)
20
taxing(adjective, difficult, complex)
19
backbreaking(adjective, difficult, complex)
19
complicated(adjective, difficult, complex)
19
hefty(adjective, difficult, complex)
19
intricate(adjective, difficult, complex)
19
involved(adjective, difficult, complex)
19
profound(adjective, difficult, complex)
18
hurtful(adjective, severe, sharp, tender)
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APASmart Define. (2015). painful thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/painful/thesaurus/synonyms
ChicagoSmart Define. 2015. "painful thesaurus" https://smartdefine.org/painful/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, painful thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/painful/thesaurus/synonyms>.
MLASmart Define. "painful thesaurus" 21 July 2015. Web. 29 September 2026. <https://smartdefine.org/painful/thesaurus/synonyms>