Combustible
Combustible adjective - Capable of catching or being set on fire.
Usage example: don't store oily rags and other combustible materials in a hot attic
Nearby Words: combustion, combustibility
Fireproof
Fireproof adjective - Incapable of being burned.
Usage example: remember to store valuable papers in a fireproof box
Combustible is an antonym for fireproof.
Both words in one sentence
- Nominally everything was fireproof, but the capsule used a pure-oxygen atmosphere at greater than sea-level pressure to simulate the vacuum of space, soaking the internal materials and turning them super-combustible.
Cite this Source
Fireproof and Combustible. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/combustible/fireproof
Combustible & Fireproof. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/combustible/fireproof>.
Fireproof or Combustible. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/combustible/fireproof.
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