164 entries under difficult topic. ×

21
stern(adjective, hard, easy, severe, rough)
21
stodgy(adjective, hard, complex)
20
nasty(adjective, mean, bad, hard, cool)
20
ambitious(adjective, hard, complex)
20
involved(adjective, hard, complex)
20
massive(adjective, person, body, hard)
19
byzantine(adjective, hard, complex)
19
disturbing(adjective, hard, severe, awful)
19
grave(adjective, hard, severe, harsh)
19
grinding(adjective, hard, complex)
19
hard to understand(expression, adjective, idiom, hard)
19
heavy-handed(adjective, hard, complex)
19
knotted(adjective, hard, complex)
19
perplexed(adjective, hard, complex)
19
powerful(adjective, person, body, strong, great)
19
troubled(adjective, hard, complex)
19
unbearable(adjective, hard, complex)
18
convict(noun, adjective, hard, complex)
18
dire(adjective, hard, complex)
18
hard-hitting(adjective, hard, complex)
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APASmart Define. (2016). tough thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/tough/thesaurus/synonyms
ChicagoSmart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, tough thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>.
MLASmart Define. "tough thesaurus" 30 March 2016. Web. 24 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms>