advantage
ace in the hole, ace up one's sleeve, aid, ascendancy, asset, assistance, avail, benefit, blessing, boon, boot (obsolete) convenience, dominance, edge, gain, good, help, inside track, interest, lead, mileage (informal) precedence, pre-eminence, profit, service, start, superiority, sway, upper hand, use, utility, welfare, curse, difficulty, disadvantage, downside, drawback, handicap, hindrance, inconvenience, snag