roundsman vs workman

roundsman and workman both are nouns.

Word	Noun	Adjective	Verb	Adverb
roundsman	Yes	No	No	No
workman	Yes	No	No	No

As nouns, workman is a hypernym of roundsman; that is, workman 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)
workman: an employee who performs manual or industrial labor

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

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