specialty vs specialism

specialty and specialism both are nouns.

Word	Noun	Adjective	Verb	Adverb
specialty	Yes	No	No	No
specialism	Yes	No	No	No

As nouns, specialty and specialism are synonyms defined as:

specialty and specialism: the special line of work you have adopted as your career

Other synonyms of specialty include specialisation, speciality, specialization.

specialty (noun)	specialism (noun)
the special line of work you have adopted as your career	the special line of work you have adopted as your career
a distinguishing trait	the concentration of your efforts on a particular field of study or occupation
an asset of special worth or utility