320 entries under severe topic. ×

14
unpleasant(adjective, mean, cool, tough)
13
mean(adjective, person, cool, tough)
13
relentless(adjective, mean, strong, tough)
12
sharp(adjective, strong, tough, harsh)
12
unforgiving(adjective, mean, tough, rough)
12
unsparing(adjective, mean, strong, tough)
11
bitter(adjective, strong, love, tough)
11
dour(adjective, tough, sharp, nasty)
11
icy(adjective, person, mean, cool, tough)
11
implacable(adjective, mean, strong, tough)
11
inclement(noun, adjective, nature, rough)
11
inconsiderate(adjective, person, mean, tough)
11
inhuman(adjective, mean, tough, evil)
11
intransigent(adjective, determined, stiff, resolute)
11
powerful(adjective, person, body, strong, great)
11
stringent(adjective, tough, rough, firm)
10
uncompassionate(adjective, mean, cool, tough)
10
unmerciful(adjective, mean, tough, harsh)
10
uphill(adjective, great, tough, easy)
9
inhumane(adjective, person, mean, tough)
10 years ago|78k views|share |citing 
APASmart Define. (2016). hard thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hard/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, hard thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>.
MLASmart Define. "hard thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms>