playboy vs man-about-town

playboy and man-about-town both are nouns.

Word	Noun	Adjective	Verb	Adverb
playboy	Yes	No	No	No
man-about-town	Yes	No	No	No

As nouns, playboy and man-about-town are synonyms defined as:

Other synonyms of playboy include Corinthian.

playboy (noun)	man-about-town (noun)
a man devoted to the pursuit of pleasure	a man devoted to the pursuit of pleasure