speciality vs strong suit

speciality and strong suit both are nouns.

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

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

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

speciality (noun)	strong suit (noun)
the special line of work you have adopted as your career	an asset of special worth or utility
a distinguishing trait	a long suit including high cards
an asset of special worth or utility