1
unrelenting(adjective, mean, harsh, cruel, vicious)
1
vindictive(adjective, mean, harsh, cruel, vicious)
1
without pity(expression, adjective, mean, severe, harsh)
0
acrimonious(adjective, stiff, strict, demanding)
0
austere(adjective, tough, rigid, scrupulous)
0
authoritarian(adjective, tough, rigid, scrupulous)
0
barbaric
0
beastly
0
bestial
0
binding(adjective, stiff, strict, demanding, restrictive)
0
bloodthirsty
0
bloody-minded
0
boor
0
bound(adjective, persistent, constant)
0
bound and determined(expression, adjective, idiom, persistent, constant)
0
brick-wall(adjective, stiff, strict, demanding, dogged)
0
brutish
0
by the book(expression, adjective, idiom, stiff, strict)
0
by the numbers(expression, adjective, idiom, stiff, strict)
0
careful
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APASmart Define. (2015). ironfisted thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/ironfisted/thesaurus/synonyms
ChicagoSmart Define. 2015. "ironfisted thesaurus" https://smartdefine.org/ironfisted/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, ironfisted thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/ironfisted/thesaurus/synonyms>.
MLASmart Define. "ironfisted thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/ironfisted/thesaurus/synonyms>