96 entries under cruel topic. ×

5
unrelenting(adjective, strong, hard, tough, severe)
4
acrimonious(adjective, tough, severe, harsh)
4
cold-blooded(adjective, tough, harsh, grim)
4
difficult(adjective, hard, tough, severe, rough)
4
forbidding(adjective, strong, hard, tough, severe)
4
rugged(adjective, strong, hard, tough, severe)
4
unflinching(adjective, strong, flat, harsh, certain)
3
unkind(adjective, tough, harsh, grim)
3
bleak(adjective, tough, severe, harsh)
3
cold(adjective, tough, severe, harsh)
3
hard-nosed(adjective, strong, hard, tough, severe)
3
inhuman(adjective, harsh, determined, fierce)
3
merciless(adjective, hard, rough, harsh)
3
serious(adjective, strong, hard, tough, severe)
3
unappeasable(adjective, harsh, determined, fierce)
2
brutal(adjective, hard, tough, severe, rough)
2
inclement(adjective, hard, tough, severe, rough)
2
flinty(adjective, strong, hard, tough, severe)
2
grievous(adjective, hard, tough, severe, difficult)
2
implacable(adjective, set, strong, hard, tough)
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APASmart Define. (2015). strict thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/strict/thesaurus/synonyms
ChicagoSmart Define. 2015. "strict thesaurus" https://smartdefine.org/strict/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, strict thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/strict/thesaurus/synonyms>.
MLASmart Define. "strict thesaurus" 3 August 2015. Web. 28 September 2026. <https://smartdefine.org/strict/thesaurus/synonyms>