speciality vs long suit

speciality and long suit both are nouns.

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

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

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

speciality (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