forte vs long suit

forte and long suit both are nouns.

Word	Noun	Adjective	Verb	Adverb
forte	Yes	Yes	No	Yes
long suit	Yes	No	No	No

As nouns, forte and long suit are synonyms defined as:

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

forte (noun)	long suit (noun)
the stronger part of a sword blade between the hilt and the foible	an asset of special worth or utility
an asset of special worth or utility	in a hand, the suit having the most cards
a musical composition or musical passage to be performed loudly

forte (adjective)	long suit (adjective)
(used chiefly as a direction or description in music) indicating that said piece or segment should be played loudly

forte (adverb)	long suit (adverb)
used as a direction in music; to be played relatively loudly