simple past tense and past participle of accelerate

Moving or progressing faster than is usual. / Happening sooner than expected.

In the context of fire protection, a substance that accelerates the development of a fire, especially some hydrocarbon-based fuel used to spread a fire caused by arson.

Causing acceleration or speeding up; accelerating.

present participle of accelerate

An act of acceleration.

(uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.

One who, or that which, accelerates. / A device for causing acceleration. / (chemistry) A substance which speeds up chemical reactions.

(rare) Accelerated; quickened; hastened; hurried.

Third-person singular simple present indicative form of accelerate