Synonyms|419Antonyms|77|Broader|8Narrower|0Related|352

67 entries under severe topic. ×

4
callous(adjective, mean, hard, evil)
3
barbarous(adjective, animal, appearance, mean, hard)
3
brutal(adjective, mean, evil, nasty)
3
harsh(adjective, mean, strong, hard, tough)
3
heartless(adjective, mean, hard, evil)
3
inhumane(adjective, animal, mean, hard, tough)
2
bitter(adjective, strong, hard, tough)
2
fierce(adjective, animal, mean, hard, tough)
2
flinty(adjective, strong, hard, tough)
2
hard-core(adjective, strong, hard, tough)
2
punitive(adjective, harsh, cruel, reactive)
2
serious(adjective, strong, hard, tough)
2
unsparing(adjective, mean, strong, hard, tough)
1
astringent(adjective, strong, hard, tough)
1
austere(adjective, appearance, mean, strong, hard)
1
authoritarian(adjective, strong, hard, tough)
1
bestial(adjective, animal, mean, evil)
1
bloodthirsty(adjective, evil, nasty, harsh)
1
by the book(expression, adjective, idiom, strong, hard)
1
coldhearted(adjective, mean, hard, harsh)
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APASmart Define. (2016). implacable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/implacable/thesaurus/synonyms
ChicagoSmart Define. 2016. "implacable thesaurus" https://smartdefine.org/implacable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, implacable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/implacable/thesaurus/synonyms>.
MLASmart Define. "implacable thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/implacable/thesaurus/synonyms>