fashion vs style

fashion and style both are nouns.

Word	Noun	Adjective	Verb	Adverb
fashion	Yes	No	Yes	No
style	Yes	No	Yes	No

As nouns, fashion and style are synonyms defined as:

Other synonyms of fashion include manner, mode, way.

As nouns, style is a hypernym of fashion; that is, style is a word with a broader meaning than fashion:

fashion: the latest and most admired style in clothes and cosmetics and behavior
style: the popular taste at a given time

Other hypernyms of fashion include trend, vogue.

fashion (noun)	style (noun)
characteristic or habitual practice	a slender bristlelike or tubular process
consumer goods (especially clothing) in the current mode	a pointed tool for writing or drawing or engraving
how something is done or how it happens	how something is done or how it happens
the latest and most admired style in clothes and cosmetics and behavior	distinctive and stylish elegance
	the popular taste at a given time
	a particular kind (as to appearance)
	a way of expressing something (in language or art or music etc.) that is characteristic of a particular person or group of people or period
	editorial directions to be followed in spelling and punctuation and capitalization and typographical display
	(botany) the narrow elongated part of the pistil between the ovary and the stigma

fashion (verb)	style (verb)
make out of components (often in an improvising manner)	designate by an identifying term
	make consistent with certain rules of style
	make consistent with a certain fashion or style