specialty vs specialisation

specialty and specialisation both are nouns.

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

As nouns, specialty and specialisation are synonyms defined as:

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

Other synonyms of specialty include specialism, speciality, specialization.

specialty (noun)	specialisation (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 act of specializing; making something suitable for a special purpose
an asset of special worth or utility	(biology) the structural adaptation of some body part for a particular function