mill-hand vs working person

mill-hand and working person both are nouns.

Word	Noun	Adjective	Verb	Adverb
mill-hand	Yes	No	No	No
working person	Yes	No	No	No

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

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

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