mill-hand vs workingman

mill-hand and workingman both are nouns.

Word	Noun	Adjective	Verb	Adverb
mill-hand	Yes	No	No	No
workingman	Yes	No	No	No

As nouns, workingman is a hypernym of mill-hand; that is, workingman is a word with a broader meaning than mill-hand:

Other hypernyms of mill-hand include working man, working person, workman.

mill-hand (noun)	workingman (noun)
a workman in a mill or factory	an employee who performs manual or industrial labor