This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The process of burning.

n. A chemical change, especially oxidation, accompanied by the production of heat and light.

n. Violent anger or agitation: Combustion within the populace slowly built up to the point of revolution.

n. The act or process of burning.

n. A process where two chemicals are combined to produce heat.

n. A process wherein a fuel is combined with oxygen, usually at high temperature, releasing heat.

n. Violent agitation, tumult.

n. The state of burning.

n. The combination of a combustible with a supporter of combustion, producing heat, and sometimes both light and heat.

n. Violent agitation; confusion; tumult.

n. The action of fire on inflammable materials; the act or process of burning.

n. . Tumult; violent agitation with hurry and noise; inflammatory excitement; confusion; uproar.

n. In astrology, the state of being combust.

n. the act of burning something

n. a process in which a substance reacts with oxygen to give heat and light

n. a state of violent disturbance and excitement

"~ The particular oxides formed by the combustion of any substance are called _products of combustion_ of that substance."

uproar    tumultuousness    tumult    garboil   

supporter of combustion    surface combustion process    spontaneous combustion    heat of combustion    isothermal combustion   

combustible    combustive    spontaneous combustion    combustor   

deflagration    detonation   

confusion    tumult    burning    incineration    cremation   

decomposition    ignition    oxidation    burner    detonation    fusion    fuel    exhaust    explosion    extraction