Synonyms and related words :
accelerate, acerbate, agent provocateur, aggravate, alienate, amplify, annoy, antagonize, augment, beef up, bitter, blow up, build up, chafe, complicate, concentrate, condense, consolidate, damage, deepen, deteriorate, dilapidate, double, embitter, endamage, enhance, enlarge, envenom, estrange, exaggerate, exasperate, feed the fire, fret, gall, grate, grate on, gravel, grit, harm, heat up, heighten, hop up, hot up, hurt, impair, increase, inflame, infuriate, injure, intensify, irritate, jazz up, key up, madden, magnify, make acute, make complex, make worse, provoke, put back, ramify, rasp, redouble, reinforce, set against, set at odds, set on edge, sharpen, soup up, sour, step up, strengthen, triple, weaken, whet, worsen