101 entries under hard topic. ×

2
cantankerous(adjective, evil, rough, nasty)
2
delicate(bad, difficult, heavy, complex)
2
exhausting(adjective, tough, severe, rough)
2
intricate(adjective, tough, severe, difficult)
2
nasty(adjective, bad, rough, difficult)
2
profound(delicate, intense, heavy, complex)
2
tiring(adjective, tough, severe, rough)
2
treacherous(adjective, bad, evil, rough)
2
violent(adjective, severe, rough, difficult)
1
bad-tempered(adjective, evil, rough, nasty)
1
baffling(tough, delicate, complex, tricky)
1
callous(adjective, evil, rough, nasty)
1
churlish(adjective, rough, nasty, rude)
1
contemptible(adjective, evil, rough, nasty)
1
deep(adjective, tough, severe, delicate)
1
despicable(adjective, evil, rough, nasty)
1
dirty(adjective, rough, nasty, rude)
1
disagreeable(adjective, evil, rough, nasty)
1
dishonorable(adjective, evil, rough, nasty)
1
down(adjective, evil, rough, nasty)
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APASmart Define. (2015). formidable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms
ChicagoSmart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, formidable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>.
MLASmart Define. "formidable thesaurus" 17 July 2015. Web. 21 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms>