Synonyms: quickening, acceleration, speedup
Definition: the act of accelerating; increasing the speed
Synonyms: acceleration
Definition: an increase in rate of change
Usage: modern science caused an acceleration of cultural change
Similar words: change, modification, alteration
Definition: an event that occurs when something passes from one state or phase to another
Usage: the change was intended to increase sales; this storm is certainly a change for the worse; the neighborhood had undergone few modifications since his last visit years ago
Synonyms: acceleration
Definition: (physics) a rate of increase of velocity
Similar words: rate
Definition: a magnitude or frequency relative to a time unit
Usage: they traveled at a rate of 55 miles per hour; the rate of change was faster than expected