amp (up)

arouse, awake, awaken, raise, rouse, stir, wake (up)

activate, actuate, drive, impel, motivate, motive, move, propel

charge, electrify, galvanize

enkindle, excite, ferment, foment, incite, inflame (also enflame), instigate, kindle, provoke, set off, spark, trigger, turn on, whip (up)

abet, boost, buoy, cheer, embolden, fortify, hearten, infuse, inspire, lift, rally, steel, strengthen

reactivate, reanimate, reawake, reawaken, recharge, recreate, reenergize, refresh, refreshen, regenerate, reinvigorate, rejuvenate, rekindle, renew, restimulate, resurrect, resuscitate, revitalize, revive

broaden, enlarge, expand, extend, lengthen

accelerate, hasten, quicken

emphasize, point (up), sharpen, stress

augment, enforce, reinforce (also reenforce), restrengthen, supplement

maximize

enliven, jazz (up)

aggravate, exacerbate