We don't have synonyms for accelerations yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are acceleration, accelerating and accelerators.
(n) :
(uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.
(n) :
(countable) The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
(n) :
(physics) The change of velocity with respect to time (can include deceleration or changing direction).
(n) :
The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.
(n) :
(uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration.
(n) :
(countable) The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
(n) :
(physics) The change of velocity with respect to time (can include deceleration or changing direction).
(n) :
The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum.