116 entries under severe topic. ×

5
brutal(adjective, person, tough, harsh)
5
heartless(adjective, mean, harsh, cruel)
5
inflexible(adjective, strong, hard, tough)
5
obdurate(adjective, close, strong, hard, tough)
5
rigid(adjective, strong, hard, tough)
5
unfeeling(adjective, person, mean, tough)
4
dour(adjective, close, hard, tough)
4
oppressive(adjective, tough, firm, harsh)
4
uncompromising(adjective, hard, harsh, cruel)
3
authoritarian(adjective, strong, hard, tough)
3
callous(adjective, mean, tough, harsh)
3
cold(adjective, close, hard, tough)
3
grim(adjective, mean, strong, hard, tough)
3
inhumane(adjective, person, mean, harsh)
3
remorseless(adjective, harsh, cruel, persistent)
3
unbending(adjective, close, strong, hard, tough)
3
unkind(adjective, tough, harsh, cruel)
3
unyielding(adjective, mean, strong, hard, tough)
2
astringent(adjective, close, strong, hard, tough)
2
barbarous(adjective, mean, harsh, cruel)
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APASmart Define. (2016). unsparing thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unsparing/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsparing thesaurus" https://smartdefine.org/unsparing/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, unsparing thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unsparing/thesaurus/synonyms>.
MLASmart Define. "unsparing thesaurus" 24 March 2016. Web. 27 September 2026. <https://smartdefine.org/unsparing/thesaurus/synonyms>