bakshish vs gratuity

bakshish and gratuity both are nouns.

Word	Noun	Adjective	Verb	Adverb
bakshish	Yes	No	No	No
gratuity	Yes	No	No	No

As nouns, bakshish and gratuity are synonyms defined as:

bakshish and gratuity: a relatively small amount of money given for services rendered (as by a waiter)

Other synonyms of bakshish include backsheesh, baksheesh, bakshis, pourboire, tip.

bakshish (noun)	gratuity (noun)
a relatively small amount of money given for services rendered (as by a waiter)	a relatively small amount of money given for services rendered (as by a waiter)
	an award (as for meritorious service) given without claim or obligation