springboard

Short definition from Wiktionary

Noun

1. 1
   A board consisting of a flexible, springy, cantilevered platform that propels one into the air, used for diving or gymnastics.
2. 2
   Something that acts as a catalyst to begin or accelerate an action or growth.

Verb

1. 1
   To launch or propel as if from a springboard, especially toward political office.