110 entries under harsh topic. ×

1
scrupulous(adjective, hard, tough, severe, rough)
1
single-minded(adjective, cruel, determined, fierce)
1
stickling(adjective, tough, severe, firm)
1
stop at nothing(expression, adjective, idiom, cruel)
1
unappeasable(adjective, cruel, determined, fierce)
1
undeviating(adjective, severe, solid, exact)
1
unfeeling(adjective, hard, tough, severe, sharp)
1
unflinching(adjective, cruel, determined, fierce)
1
unjust(adjective, tough, severe, cruel)
1
unkind(adjective, hard, tough, severe, sharp)
1
unpermissive(adjective, hard, tough, severe, rough)
1
unpleasant(adjective, hard, tough, severe, sharp)
1
unstoppable(adjective, cruel, determined, fierce)
1
unsympathetic(adjective, tough, cruel, grim)
1
uptight(adjective, tough, severe, firm)
1
vindictive(adjective, cruel, determined, fierce)
0
callous(adjective, tough, grim, painful)
0
cold-blooded(adjective, tough, cruel, grim)
0
cold fish(expression, adjective, tough, cruel)
0
hard as nails(expression, adjective, idiom, tough, severe)
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APASmart Define. (2015). stringent thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/stringent/thesaurus/synonyms
ChicagoSmart Define. 2015. "stringent thesaurus" https://smartdefine.org/stringent/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, stringent thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/stringent/thesaurus/synonyms>.
MLASmart Define. "stringent thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/stringent/thesaurus/synonyms>