specialize vs specialization

specialize is not a noun while specialization is a noun.

Word	Noun	Adjective	Verb	Adverb
specialize	No	No	Yes	No
specialization	Yes	No	No	No

specialize (noun)	specialization (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

specialize (verb)	specialization (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