1) Acceleration 2) Blow 3) Bump 4) Jolt 5) Jolting movement 6) Move up and down 7) Move up and down repeatedly 8) Move with jolts and bumps 9) Physical quantity 10) Sudden jarring movement 11) To jolt 1) Jolt 
The dimensions of jounce are distance per (time to the power of 4). In SI units, this is `metres per quartic second`, `metres per second per second per second per second`, m/s4, m · s−4, or 100 Gal per second squared in CGS units. This pattern continues for higher order derivatives, with the 5th being m/s5. One arbitrary example is the 10th...
to bump or jolt
• (v. t. & i.) To jolt; to shake, especially by rough riding or by driving over obstructions. • (n.) A jolt; a shake; a hard trot.
The motion of a wheel that compresses its suspension.
Jounce (jouns) transitive verb & i. [ imperfect & past participle Jounced (jounst); present participle & verbal noun Jouncing (joun'sĭng).] [ Confer Jaunce .] To jolt; to shake, especially by rough riding or by driving over o...Jounce noun A jolt; a shake; a hard trot. 
verb move up and down repeatedly
[Literary terms] move up and down repeatedly