Antonyms of adj flame-retardant

1 sense of flame-retardant

Sense 1
flameproof, flame-retardant -- (resistant to catching fire)

INDIRECT (VIA noncombustible) -> combustible -- (capable of igniting and burning)

Similarity of adj flame-retardant

1 sense of flame-retardant

Sense 1
flameproof, flame-retardant -- (resistant to catching fire)
       => noncombustible (vs. combustible), incombustible -- (not capable of igniting and burning)