specialisation vs career

specialisation and career both are nouns.

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

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

Other hypernyms of specialisation include calling, vocation.

specialisation (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

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