bakshish vs bakshis

bakshish and bakshis both are nouns.

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

As nouns, bakshish and bakshis are synonyms defined as:

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

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

bakshish (noun)	bakshis (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)