Gratuity

n.	1.	Something given freely or without recompense; a free gift; a present.
	2.	Something voluntarily given in return for a favor or service, as a recompense or acknowledgment.

Noun	1.	gratuity - a relatively small amount of money given for services rendered (as by a waiter) Synonyms: backsheesh, baksheesh, bakshis, bakshish, pourboire, tip
	2.	gratuity - an award (as for meritorious service) given without claim or obligation

Trinkgeld, balance, boodle, bounty, bribe, bribe money, complimentariness, consideration, costlessness, dividend, donative, double time, expenselessness, extra, fee, free ride, freebie, freeness, gratification, gratuitousness, gravy, grease, honorarium, hush money, incentive pay, inducement, labor of love, lagniappe, largess, leftover, liberality, margin, no charge, overage, overmeasure, overplus, overrun, overset, overstock, oversupply, palm, palm oil, payoff, payola, perks, perquisite, plus, pourboire, premium, protection, remainder, reward, salve, something extra, sop, spare, sportula, surplus, surplusage, sweetener