manner vs fashion

manner and fashion both are nouns.

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

As nouns, manner and fashion are synonyms defined as:

Other synonyms of manner include mode, style, way.

manner (noun)	fashion (noun)
a way of acting or behaving	characteristic or habitual practice
how something is done or how it happens	consumer goods (especially clothing) in the current mode
a kind	how something is done or how it happens
	the latest and most admired style in clothes and cosmetics and behavior

manner (verb)	fashion (verb)
	make out of components (often in an improvising manner)