style vs fashion

style and fashion both are nouns.

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

As nouns, style and fashion are synonyms defined as:

Other synonyms of style include manner, mode, way.

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

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

Other hyponyms of style include New Look, bandwagon.

style (noun)	fashion (noun)
a slender bristlelike or tubular process	characteristic or habitual practice
a pointed tool for writing or drawing or engraving	consumer goods (especially clothing) in the current mode
how something is done or how it happens	how something is done or how it happens
distinctive and stylish elegance	the latest and most admired style in clothes and cosmetics and behavior
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

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