specialise vs specialisation

specialise is not a noun while specialisation is a noun.

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

specialise (noun)	specialisation (noun)
	the special line of work you have adopted as your career
	the act of specializing; making something suitable for a special purpose
	(biology) the structural adaptation of some body part for a particular function

specialise (verb)	specialisation (verb)
become more focused on an area of activity or field of study
suit to a special purpose
evolve so as to lead to a new species or develop in a way most suited to the environment
be specific about
devote oneself to a special area of work