110 entries under hard topic. ×

13
inhumane(adjective, animal, person, mean)
13
uncompassionate(adjective, animal, mean, tough)
13
unforgiving(adjective, person, mean, tough)
12
inexorable(adjective, mean, tough, severe)
12
stony(adjective, mean, tough, severe)
11
cold(adjective, mean, tough, severe)
11
murderous(adjective, tough, harsh, violent)
11
unrelenting(adjective, animal, mean, tough)
10
implacable(adjective, animal, mean, tough)
10
insensitive(adjective, tough, severe, harsh)
10
obdurate(adjective, mean, tough, severe)
9
tough(adjective, severe, sharp, harsh)
8
cutthroat(adjective, mean, severe, care)
8
grim(adjective, animal, mean, tough)
8
hardhearted(adjective, mean, severe, care)
8
mean(verb, adjective, animal, severe)
7
indifferent(adjective, care, cold, unfeeling)
7
tyrannical(adjective, tough, nasty, harsh)
7
unyielding(adjective, mean, tough, severe)
6
stern(adjective, mean, severe, sharp)
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APASmart Define. (2016). pitiless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/pitiless/thesaurus/synonyms
ChicagoSmart Define. 2016. "pitiless thesaurus" https://smartdefine.org/pitiless/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, pitiless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/pitiless/thesaurus/synonyms>.
MLASmart Define. "pitiless thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/pitiless/thesaurus/synonyms>