197 entries under hard topic. ×

7
formidable(adjective, severe, evil, rough)
7
heavy(adjective, calm, strong, sound)
7
rigorous(adjective, strong, tough, severe)
7
uphill(adjective, severe, rough, difficult)
6
exacting(adjective, tough, severe, rough)
6
inclement(adjective, tough, severe, rough)
6
onerous(adjective, tough, severe, rough)
6
steely(adjective, strong, tough, sturdy)
6
ugly(adjective, calm, evil, rough)
5
asperous(adjective, severe, sharp, rough)
5
austere(adjective, strong, tough, severe)
5
dissonant(adjective, severe, sharp, flat)
5
stony(adjective, set, harsh, coarse)
5
unyielding(adjective, strong, sound, tough)
4
adamantine(adjective, set, strong, tough)
4
cacophonous(adjective, severe, sharp, rough)
4
dense(adjective, set, strong, tough)
4
grating(adjective, severe, sharp, rough)
4
grim(adjective, strong, tough, severe)
4
intemperate(adjective, tough, severe, rough)
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APASmart Define. (2015). rugged thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rugged/thesaurus/synonyms
ChicagoSmart Define. 2015. "rugged thesaurus" https://smartdefine.org/rugged/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, rugged thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rugged/thesaurus/synonyms>.
MLASmart Define. "rugged thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/rugged/thesaurus/synonyms>