specialty vs long suit

specialty and long suit both are nouns.

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

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

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

specialty (noun)	long suit (noun)
the special line of work you have adopted as your career	an asset of special worth or utility
a distinguishing trait	in a hand, the suit having the most cards
an asset of special worth or utility