working man vs working person

working man and working person both are nouns.

Word	Noun	Adjective	Verb	Adverb
working man	Yes	No	No	No
working person	Yes	No	No	No

As nouns, working man and working person are synonyms defined as:

working man and working person: an employee who performs manual or industrial labor

Other synonyms of working man include workingman, workman.

working man (noun)	working person (noun)
an employee who performs manual or industrial labor	an employee who performs manual or industrial labor