Synonyms and related words :
accelerate, agent provocateur, aggravate, agitate, alienate, amplify, annoy, antagonize, arouse, augment, beef up, blow the coals, blow up, build up, complicate, concentrate, condense, consolidate, deepen, deteriorate, double, embitter, enhance, enlarge, envenom, estrange, exacerbate, exaggerate, exasperate, excite, fan, fan the flame, feed the fire, ferment, fire, foment, heat, heighten, hop up, hot up, impassion, incense, incite, increase, inflame, infuriate, instigate, intensify, irritate, jazz up, key up, madden, magnify, make acute, make complex, make worse, nettle, pique, provoke, put up to, rally, ramify, redouble, reinforce, set against, set at odds, set on, sharpen, sic on, soup up, sour, step up, stir the embers, stir up, strengthen, tickle, triple, whet, whip up, work up, worsen