man-about-town vs playboy

man-about-town and playboy both are nouns.

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

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

Other synonyms of man-about-town include Corinthian.

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