THESAURUS
key up
accelerate, aggravate, annoy, arouse, awake, awaken, beef up, blow the coals, blow up, call forth, call up, complicate, concentrate, condense, consolidate, deepen, double, enhance, enkindle, enrage, exacerbate, exaggerate, excite, fan, fan the fire, fan the flame, feed the fire, fire, flame, foment, frenzy, heat, heat up, heighten, hop up, hot up, impassion, incense, incite, inflame, infuriate, intensify, jazz up, kindle, lather up, light the fuse, light up, madden, magnify, make complex, move, overexcite, ramify, redouble, reinforce, rouse, set astir, set fire to, set on fire, sharpen, soup up, steam up, step up, stir, stir the blood, stir the embers, stir the feelings, stir up, strengthen, summon up, triple, turn on, wake, wake up, waken, warm, warm the blood, whet, whip up, work into, work up