bakshis vs gratuity

bakshis and gratuity both are nouns.

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

As nouns, bakshis and gratuity are synonyms defined as:

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

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

bakshis (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