Yes, leap is a Scrabble word!

Verb

1. Move forward by leaps and bounds

2. Pass abruptly from one state or topic to another

3. Jump down from an elevated point

4. Cause to jump or leap

Noun

1. A light, self-propelled movement upwards or forwards

2. An abrupt transition

3. A sudden and decisive increase

4. The distance leaped (or to be leaped)