specialisation vs specialism

specialisation and specialism both are nouns.

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

As nouns, specialisation and specialism are synonyms defined as:

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

Other synonyms of specialisation include speciality, specialization, specialty.

specialisation (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
the act of specializing; making something suitable for a special purpose	the concentration of your efforts on a particular field of study or occupation
(biology) the structural adaptation of some body part for a particular function