260 entries under adjective topic. ×

1
metallic(metal, made)
1
mousy(dull, lead, grim, leaden)
1
mulish(mean, strong, hard, tough)
1
mutinous(persistent, obstinate, insistent, dogged)
1
nailed(strong, solid, stable, sure)
1
narrow-minded(persistent, obstinate, insistent, dogged)
1
obsessive(persistent, obstinate, insistent, dogged)
1
oyster(dull, lead, grim, leaden)
1
peppery(dull, lead, grim, leaden)
1
perverse(mean, hard, tough, firm)
1
pigheaded(mean, hard, tough, firm)
1
pight
1
powder(dull, lead, grim, leaden)
1
racy
1
resilient
1
robustious
1
rock-solid
1
rocklike(firm, stiff, rigid, steel)
1
safe and sound(expression, idiom, strong, solid)
1
secure(verb, stable, safe, sheltered)
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APASmart Define. (2015). iron thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/iron/thesaurus/synonyms
ChicagoSmart Define. 2015. "iron thesaurus" https://smartdefine.org/iron/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, iron thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/iron/thesaurus/synonyms>.
MLASmart Define. "iron thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/iron/thesaurus/synonyms>