Incombustible and Nonflammable

Incombustible

Incombustible adjective - Incapable of being burned.
Usage example: we keep our important papers in an incombustible safe in the basement

Nonflammable is a synonym for incombustible in fireproof topic. In some cases you can use "Nonflammable" instead an adjective "Incombustible", when it comes to topics like resistant to burning.

Nearby Word: incombustibility

Nonflammable

Nonflammable adjective - Incapable of being burned.
Usage example: children's pajamas made of nonflammable fabric

Incombustible is a synonym for nonflammable in resistant to burning topic. You can use "Incombustible" instead an adjective "Nonflammable".
Cite this Source
Nonflammable and Incombustible. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/incombustible/nonflammable
Incombustible & Nonflammable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/incombustible/nonflammable>.
Nonflammable or Incombustible. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/incombustible/nonflammable.
Google Ngram Viewer shows how "incombustible" and "nonflammable" have occurred on timeline