roundsman vs working man

roundsman and working man both are nouns.

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

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

roundsman: a workman employed to make rounds (to deliver goods or make inspections or so on)
working man: an employee who performs manual or industrial labor

Other hypernyms of roundsman include working person, workingman, workman.

roundsman (noun)	working man (noun)
a workman employed to make rounds (to deliver goods or make inspections or so on)	an employee who performs manual or industrial labor