workingman vs working person

workingman and working person both are nouns.

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

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

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

Other synonyms of workingman include working man, workman.

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