whet, accelerate, aculeate, acuminate, aggravate, agitate, animate, antepast, antipasto, aperitif, appetizer, arouse, awaken, bait, barb, beef up, bestir, blow the coals, blow up, bribe , canape, carrot, challenge, complicate, concentrate, condense, consolidate, cultivate, cuspidate, deepen, double, edge, encouragement, enhance, enliven, exacerbate, exaggerate, excite, exhilarate, fan, fan the flame, feed the fire, ferment, file, fillip, fire, foment, foretaste, galvanize, grind, heat, heat up, heighten, hone, hop up, hot up, impassion, incense, incentive, incite, incitement, inducement, inflame, infuse life into, instigate, intensify, interest, invigorate, invitation, jazz up, key up, kindle, lure, magnify, make complex, make sensitive, nettle, oilstone, payment, percentage, persuasive, pick up, pique, point, profit, provocation, provoke, put up to, quicken, rally, ramify, redouble, refine, renew, reset, resuscitate, revive, reward, rouse, sensibilize , sensitize, set, set on, sharp, sharpen, sic on, smorgasbord, soup up, spiculate, spur, step up, stimulate, stimulation, stimulative, stimulus, stir, stir the embers, stir up, strap, strengthen, strop, sweetener, sweetening, taper, tickle, triple, wake, waken, whip up, work up