- Hastening - Increase of speed - Quickening - Stepping up - The act of accelerating, or the state of being
accelerated; increase of motion or action; as, a falling body moves
toward the earth with an acceleration of velocity; -- opposed to
retardation.
- Boots designed for speed increase - Encourage - Help along - Impetus - Improve - Improve third act following catcalls - Increase tempo after negative reactions