owner vs man of affairs

owner and man of affairs both are nouns.

Word	Noun	Adjective	Verb	Adverb
owner	Yes	No	No	No
man of affairs	Yes	No	No	No

As nouns, man of affairs is a hypernym of owner; that is, man of affairs is a word with a broader meaning than owner:

owner: (law) someone who owns (is legal possessor of) a business
man of affairs: a person engaged in commercial or industrial business (especially an owner or executive)

Other hypernyms of owner include businessman.

owner (noun)	man of affairs (noun)
(law) someone who owns (is legal possessor of) a business	a person engaged in commercial or industrial business (especially an owner or executive)
a person who owns something