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iron will

NOUN

decision

Synonyms

STRONGEST

determination resolution

STRONG

backbone decisiveness doggedness earnestness firmness fortitude grit obstinacy obstinance perseverance persistence pluck purpose purposefulness resoluteness resolve seriousness spine stubbornness volition will

WEAK

decidedness purposiveness will power

Antonyms

STRONG

cowardice flexibility idleness indolence irresolution unimportance weakness

WEAK

deferment deferral delay indecision indefiniteness indetermination postponement procrastination wavering

NOUN

purposefulness

Synonyms

STRONG

backbone decisiveness determination doggedness earnestness firmness fortitude grit obstinacy obstinance perseverance persistence pluck purpose resoluteness resolution resolve seriousness spine stubbornness toughness volition will willpower

WEAK

decidedness purposiveness will power

Antonyms

STRONG

cowardice flexibility idleness indecision indolence irresolution question spinelessness unimportance weakness

NOUN

resoluteness

Synonyms

STRONG

backbone decisiveness determination doggedness earnestness firmness fortitude grit obstinacy obstinance perseverance persistence pluck purpose purposefulness resolution resolve seriousness spine stubbornness toughness volition will willpower

WEAK

decidedness purposiveness will power

Antonyms

STRONG

cowardice flexibility idleness indecision indolence irresolution question spinelessness unimportance weakness

NOUN

toughness

Synonyms

STRONGEST

decisiveness firmness fortitude grit perseverance persistence resolve seriousness stubbornness willpower

STRONG

backbone doggedness earnestness obstinacy obstinance pluck purpose purposefulness resoluteness resolution spine volition will

WEAK

decidedness purposiveness will power

Antonyms

STRONGEST

cowardice flexibility idleness indolence weakness

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Reid’s impoverished youth in a tiny hamlet in southern Nevada gave him an iron will, steep ambition and a sizable chip on his shoulder.

From The Wall Street Journal • Jan. 16, 2026

It’s fairly obvious who Hawley channeled to create Prodigy’s overlord, whereas Sandra Yi Sencindiver’s Yutani fits a concept; she’s all silk tailoring and iron will.

From Salon • Aug. 5, 2025

But showing iron will, great determination and self-discipline, Pant fought his way back from what seemed a dead-end to his career.

From BBC • Dec. 7, 2024

It can’t be easy for Jean-Michel to have turned out so square when his parents are so defiantly curlicued, but Haddad lends the young man both an iron will and a conscience.

From Los Angeles Times • Nov. 19, 2024

Luckily, Cook had lived through more than one tragedy at Daffodil Manor, and she took over the management of the household as she always did, without a complaint and with an iron will.

From "Ophie's Ghosts" by Justina Ireland

iron will

Example Sentences

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