financier vs banker

financier and banker both are nouns.

Word	Noun	Adjective	Verb	Adverb
financier	Yes	No	Yes	No
banker	Yes	No	No	No

As nouns, banker is a hyponym of financier; that is, banker is a word with a more specific, narrower meaning than financier:

Other hyponyms of financier include city man, dealer, principal.

financier (noun)	banker (noun)
a person skilled in large scale financial transactions	a financier who owns or is an executive in a bank
	the person in charge of the bank in a gambling game

financier (verb)	banker (verb)
conduct financial operations