specialization vs career

specialization and career both are nouns.

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

As nouns, career is a hypernym of specialization; that is, career is a word with a broader meaning than specialization:

Other hypernyms of specialization include calling, vocation.

specialization (noun)	career (noun)
the special line of work you have adopted as your career	the particular occupation for which you are trained
the act of specializing; making something suitable for a special purpose	the general progression of your working or professional life
(biology) the structural adaptation of some body part for a particular function

specialization (verb)	career (verb)
	move headlong at high speed