FIREPROOF Synonyms: 29 Similar and Opposite Words

fireproof

adjective

ˈfī(-ə)r-ˌprüf

Definition of fireproof

as in noncombustible

incapable of being burned remember to store valuable papers in a fireproof box

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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 fireproof Purchases allegedly made by Burke under aliases also included cadaver bags, heavy-duty laundry bags, chain saws, a shovel and a fireproof mat, Byers testified. — Madeline Morrison, NBC news, 22 July 2026 The Iroquois Theatre fire resulted in reforms such as fireproof scenery and stage curtains, illuminated exits and doors that open outward. — Kori Rumore, Chicago Tribune, 11 July 2026 Ultimately, the Studies Building came to be composed in the International Style out of concrete, stone, wood and transite, a fireproof composite material. — News Desk, Artforum, 7 July 2026 The manufacturer of your gun cabinet should give precise ratings on their fireproof or waterproof limitations. — Bestreviews, Mercury News, 7 July 2026 See All Example Sentences for fireproof

Recent Examples of Synonyms for fireproof

Adjective

This trend includes use of nicotine alone in noncombustible products such as nicotine pouches, or in combination with caffeine and nootropics, which are substances marketed to enhance cognition.

— Hasmeena Kathuria, The Conversation, 22 Sep. 2026
For example, potted plants must be in noncombustible pots and easily movable.

— Paris Barraza, USA Today, 17 Aug. 2026

Definition of noncombustible

Adjective

The Tribune claimed its four-story building constructed of stone, brick and iron at the southeast corner of Dearborn and Madison streets was incombustible.

— Chicago Tribune staff, Chicago Tribune, 22 May 2022
The Chicago Tribune claimed its four-story building constructed of stone, brick and iron at the southeast corner of Dearborn and Madison streets was incombustible.

— Kori Rumore, chicagotribune.com, 1 Oct. 2021

Definition of incombustible

Adjective

Residents should clear dead or dying vegetation around their homes, landscape with fire-resistant plants and nonflammable ground cover, and find alternative ways to dispose of landscape debris, according to Cal Fire’s Nevada-Yuba-Placer Unit.

— Haley Parsley, Sacbee.com, 17 June 2026
That’s where nonflammable alternatives become essential.

— Georgina Jedikovska, Interesting Engineering, 6 May 2026

Definition of nonflammable

Browse Nearby Words

firepower

fireproof

fires

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Style

“Fireproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fireproof. Accessed 7 Oct. 2026.

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Synonyms of fireproof

adjective

Example Sentences

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