incombustible

Synonyms:

noncombustible

fireproof

impervious to damage by fire

fire-resistant, fire-resisting, fire-resistive, fire-retardant

difficult to burn

flame-retardant, flameproof

resistant to catching fire

nonflammable

impossible to ignite

Antonyms:

combustible

capable of igniting and burning

burnable, ignitable, ignitible

capable of burning

comburant, comburent, combustive

supporting combustion

flammable, inflammable

easily ignited

ignescent

can emit sparks or burst into flame

incendiary

capable of catching fire spontaneously or causing fires or burning readily

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