Yes, jump is a Scrabble word!

Verb

1. Move forward by leaps and bounds

2. Move or jump suddenly, as if in surprise or alarm

3. Make a sudden physical attack on

4. Increase suddenly and significantly

5. Be highly noticeable

6. Enter eagerly into

7. Rise in rank or status

8. Jump down from an elevated point

9. Run off or leave the rails

10. Jump from an airplane and descend with a parachute

11. Cause to jump or leap

12. Start (a car engine whose battery is dead) by connecting it to another car's battery

13. Bypass

14. Pass abruptly from one state or topic to another

15. Go back and forth; swing back and forth between two states or conditions

Noun

1. A sudden and decisive increase

2. An abrupt transition

3. (film) an abrupt transition from one scene to another

4. A sudden involuntary movement

5. Descent with a parachute

6. The act of jumping; propelling yourself off the ground