Same word as quicken:

accelerate, activate, actuate, animate, arouse, awaken, dispatch, energize, excite, expedite, galvanize, goad, grow, hasten, hurry, impel, incite, increase, innervate, innerve, inspire, kindle, liven, make haste, motivate, move, pique, precipitate, promote, refresh, revitalize, revive, rouse, shake up, speed, spring, spur, step up, stimulate, stir, strengthen, urge, vitalize, vivificate, vivify