Same word as vantage:

aid, ascendancy, asset, assistance, authority, avail, blessing, boon, break, choice, comfort, convenience, dominance, drop, edge, eminence, expediency, favor, gain, good, gratification, handicap, head start, help, hold, improvement, influence, interest, lead, leeway, leg-up, leverage, luck, mastery, odds, position, power, pre-eminence, precedence, preference, prestige, prevalence, profit, protection, recognition, resources, return, sanction, start, starting, superiority, support, supremacy, upper hand, utility, wealth