strong suit vs metier

strong suit and metier both are nouns.

Word	Noun	Adjective	Verb	Adverb
strong suit	Yes	No	No	No
metier	Yes	No	No	No

As nouns, strong suit and metier are synonyms defined as:

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

strong suit (noun)	metier (noun)
an asset of special worth or utility	an occupation for which you are especially well suited
a long suit including high cards	an asset of special worth or utility