92 entries under grim topic. ×

1
grievous(adjective, hard, tough, severe, harsh)
1
hard-bitten(adjective, hard, tough, harsh, cruel)
1
hard-boiled(adjective, strong, hard, tough, severe)
1
hardened(adjective, hard, tough, harsh, cruel)
1
hardheaded(adjective, strong, hard, tough, severe)
1
impenitent(adjective, hard, tough, harsh, cruel)
1
inhumane(adjective, hard, tough, harsh, cruel)
1
insensitive(adjective, hard, tough, harsh, cruel)
1
mortified(adjective, strong, hard, tough, severe)
1
sanguinary(adjective, hard, tough, harsh, cruel)
1
serious(adjective, strong, hard, tough, severe)
1
shameless(adjective, hard, tough, harsh, cruel)
1
sour(adjective, hard, tough, harsh, cruel)
1
uncontrite(adjective, hard, tough, harsh, cruel)
1
unforgiving(adjective, hard, tough, severe, harsh)
1
unmerciful(adjective, hard, tough, harsh, cruel)
1
unpleasant(adjective, tough, severe, harsh, cruel)
1
unregenerate(adjective, hard, tough, harsh, cruel)
1
unremitting(adjective, hard, tough, harsh, cruel)
1
unrepenting(adjective, hard, tough, harsh, cruel)
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APASmart Define. (2016). rigorous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms
ChicagoSmart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, rigorous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>.
MLASmart Define. "rigorous thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms>