71 entries under hard topic. ×

23
merciless(adjective, person, mean, tough)
23
relentless(adjective, mean, tough, severe)
18
pitiless(adjective, person, mean, tough)
18
ruthless(adjective, mean, tough, severe)
17
inexorable(adjective, mean, tough, severe)
17
unrelenting(adjective, mean, tough, severe)
16
cruel(adjective, mean, severe, rough)
14
harsh(adjective, mean, tough, severe)
14
implacable(adjective, mean, tough, severe)
13
grim(adjective, mean, tough, severe)
11
stern(adjective, mean, severe, rough)
11
brutal(adjective, person, mean, severe)
11
unmerciful(adjective, mean, tough, severe)
9
adamant(adjective, person, mean, rough)
9
heartless(adjective, mean, severe, harsh)
9
inflexible(adjective, person, rough, harsh)
9
severe(adjective, person, mean, rough)
9
stony(adjective, person, mean, harsh)
9
uncompromising(adjective, severe, rough, harsh)
9
unyielding(adjective, mean, tough, severe)
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APASmart Define. (2016). unforgiving thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unforgiving/thesaurus/synonyms
ChicagoSmart Define. 2016. "unforgiving thesaurus" https://smartdefine.org/unforgiving/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unforgiving thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unforgiving/thesaurus/synonyms>.
MLASmart Define. "unforgiving thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/unforgiving/thesaurus/synonyms>