Synonyms of fireproof

fireproof

adjective

ˈfī(-ə)r-ˌprüf 

as in noncombustible

incapable of being burned

remember to store valuable papers in a fireproof box

Synonyms & Similar Words

• noncombustible
• incombustible
• nonflammable
• noninflammable
• nonexplosive

Antonyms & Near Antonyms

• combustible
• flammable
• inflammable
• burnable
• ignitable
• burning
• lit
• flaming
• fiery
• ignited
• blazing
• inflamed
• aflame
• explosive
• volcanic
• kindled
• incendiary
• combusting
• consumable
• afire
• ablaze

Example Sentences

Recent Examples of fireproof

The entire city block-sized Norton Tire warehouse was leveled, save a massive, fireproof computer vault that kept the company’s business records intact. — Howard Cohen, Miami Herald, 15 Apr. 2026

Backed by long-term capital, strategic foresight, and $6 trillion in sovereign assets, the foundation is proving remarkably fireproof. — Winston Ma, semafor.com, 13 Apr. 2026

The proposal originally would have required companies to cover the homes of individuals who take specific steps to make their homes more fireproof, an idea that advocates and legislators have pitched for years. — Stephen Hobbs, Sacbee.com, 23 Apr. 2026

Pool balls crack while patrons flash cash at Scoty Hopkins, who’s tended bar for nearly a decade inside the mammoth structure, which in 1886 was the first fireproof building constructed in Contra Costa County. — Katie Lauer, Mercury News, 8 June 2026