business life vs vocation

business life and vocation both are nouns.

Word	Noun	Adjective	Verb	Adverb
business life	Yes	No	No	No
vocation	Yes	No	No	No

As nouns, vocation is a hypernym of business life; that is, vocation is a word with a broader meaning than business life:

business life: a career in industrial or commercial or professional activities
vocation: the particular occupation for which you are trained

Other hypernyms of business life include calling, career.

business life (noun)	vocation (noun)
a career in industrial or commercial or professional activities	the particular occupation for which you are trained
	a body of people doing the same kind of work