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

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n. A substance, such as a petroleum distillate, that is used as a catalyst, as in spreading an intentionally set fire.

n. Any substance that can bond, mix, or disturb another substance and cause an increase in the speed of a natural or artificial chemical process.

n. A substance that accelerates the development of a fire; especially some petroleum product used to spread an act of arson

n. A substance used to catalyze the vulcanization of rubber

That accelerates; accelerating.

n. That which quickens; specifically, one of the nerves stimulation of which causes increased rapidity of the heart's action.

"This would just remove an effective "accelerant" to further economic decline."

catalyst   

palynomorph    engine-driven    ignitable    biological-agent    chemical-agent