Synonyms to edge

ace in the hole, advantage, backlog, bulge, cache, coign of vantage, drop, flying start, head start, inside track, jump, nest egg, odds, reserve, reserve fund, reserve supply, reserves, reservoir, resource, running start, savings, sinking fund, something extra, something in reserve, start, stockpile, unexpended balance, upper hand, vantage, vantage ground, vantage point, whip hand, acerbity, acescency, acid, acidity, acidness, acidulousness, acridity, acridness, acrimony, animosity, asperity, astringence, astringency, bile, bite, bitingness, bitter pill, bitter resentment, bitterness, bitterness of spirit, causticity, causticness, choler, corrosiveness, crabbedness, cuttingness, dourness, dryness, fierceness, gall, gall and wormwood, gnashing of teeth, greenness, grip, hard feelings, harshness, heartburning, hyperacidity, incisiveness, keenness, mordacity, mordancy, piercingness, piquancy, poignancy, point, pungency, rancor, rankling, rigor, roughness, severity, sharpness, slow burn, soreness, sour, sourishness, sourness, spleen, stabbingness, sting, stridency, stringency, subacidity, surlines