Synonyms for Quicken (same or very similar meaning)
WordNet sense 1 (make keen or more acute):
whetWordNet sense 2 (give life or energy to):
invigorateWordNet sense 3 (move faster):
accelerate, speedWordNet sense 4 (give new life or energy to):
animate, reanimate, recreate, renovate, repair, revive, revivify, vivify, animate, recreate, repairFrom the ODE community, based on WordNetadd/edit