1. verb /əkˈsɛləˌreɪt/
to accelerate the growth of a plant, the increase of wealth, etc.
to accelerate our departure.
2. adjective /əkˈsɛləˌreɪt/
Accelerated; quickened; hastened; hurried.
... a general knowledg of the definition of motion, and of the distinction of natural and violent, even and accelerate, and the like, sufficing.
Wikipedia foundation.