CAST-IRON Synonyms: 155 Similar and Opposite Words

cast-iron

adjective

ˈkast-ˈī(-ə)rn

Definition of cast-iron

as in strict

not allowing for any exceptions or loosening of standards lost weight only after a cast-iron adherence to his diet

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in sturdy

able to withstand hardship, strain, or exposure he has a cast-iron faith in his innate ability to overcome any adversity that life might throw against him

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of cast-iron Heat a cast-iron skillet or grill pan over medium-high heat. — Kelly McCarthy, ABC News, 26 June 2026 Guerra baked his pizza version in a deep pan, similar to a cast-iron skillet, in a shape that was squared off. — Paula Wethington, CBS News, 23 June 2026 My favorite fish is salmon, and a great way to prepare it is in a cast-iron skillet. — Jennifer Berger, Verywell Health, 22 June 2026 Ready in just 30 minutes, this skillet cookie stars a molten center and crispy edges thanks to being baked a cast-iron skillet. — Lynn Andriani, Martha Stewart, 19 June 2026 See All Example Sentences for cast-iron

Recent Examples of Synonyms for cast-iron

Adjective

Though South Florida abides by strict statewide building codes to protect against wind and flooding, Lejeune is concerned that no new construction has been tested by destructive storms.

— Jacqui Palumbo, CNN Money, 21 July 2026
In the 2026 session, the Legislature passed HB 991, an elections bill that requires strict proof of citizenship to vote and reduces the forms of photo ID that are acceptable at the polls.

— Eric "Doc" Stelnicki, Sun Sentinel, 20 July 2026

Definition of strict

Adjective

Made from rust-resistant, double-layered aluminum, the table feels light enough to move around, but also sturdy enough not to blow over in a storm.

— Sarah Scott, Southern Living, 19 July 2026
Odysseus also prided himself on being the only person able to string his sturdy bow.

— Tanya Fedak, Variety, 18 July 2026

Definition of sturdy

Adjective

For more than two decades, the duo hauled in more than 4 pounds of clams each morning from the lagoon in the Po River Delta — upending the notion that women were unsuited for such a rigorous job.

— Kasha Patel, CNN Money, 18 July 2026
Over the summer, kids might not have had to stick to a rigorous morning routine, but that all changes during the school year.

— Parents, Parents, 17 July 2026

Definition of rigorous

Adjective

Often grown as a companion plant for vegetables, borage (Borago officinalis) is a hardy annual with periwinkle blue flowers that attract pollinators and other beneficial insects.

— Lauren Landers, Better Homes & Gardens, 13 July 2026
Common geraniums grow in USDA zones 9-12, but there are other varieties—like hardy geraniums—that can grow in zones 3-9 as well.

— The Spruce, The Spruce, 11 July 2026

Definition of hardy

Adjective

Similarly, relying on a single, rigid path for payments is no longer enough, and alternative routes must be available.

— Moshe Kimhi, Forbes.com, 21 July 2026
The ferry, Edghill said, was fitted with 250 life jackets, two rigid life rafts and six inflatable life rafts.

— Jacqueline Charles, Miami Herald, 21 July 2026

Definition of rigid

Adjective

After a strong start to the tournament, the reigning champions teetered on the brink of elimination throughout the knockout stage, trailing Egypt and England until the closing stages, needing extra time to overcome Cape Verde and Switzerland.

— Oliver Kay, New York Times, 20 July 2026
The incoming prime minister grew up in the northwest of England, a part of the country where the Catholic Church has traditionally had a strong presence, and his outlook has been shaped by Catholic teaching.

— Hanna Ziady, CNN Money, 20 July 2026

Definition of strong

Adjective

In this tournament, Morocco has tried to develop from the 2022 team, which relied on stout defense, into one that can outplay more teams.

— Dan Santaromita, New York Times, 9 July 2026
La Albiceleste created more chances but could not get past the viral sensation in net or the stout Cape Verdean defense before the halftime whistle blew.

— Jacob Lev, CNN Money, 3 July 2026

Definition of stout

Browse Nearby Words

casting (up)

cast-iron

castle

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Style

“Cast-iron.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/cast-iron. Accessed 23 Jul. 2026.

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Synonyms of cast-iron

adjective

Example Sentences

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