specialty vs metier

specialty and metier both are nouns.

Word	Noun	Adjective	Verb	Adverb
specialty	Yes	No	No	No
metier	Yes	No	No	No

As nouns, specialty and metier are synonyms defined as:

Other synonyms of specialty include forte, long suit, speciality, strength, strong point, strong suit.

specialty (noun)	metier (noun)
the special line of work you have adopted as your career	an occupation for which you are especially well suited
a distinguishing trait	an asset of special worth or utility
an asset of special worth or utility