mill-hand vs factory worker

mill-hand and factory worker both are nouns.

Word	Noun	Adjective	Verb	Adverb
mill-hand	Yes	No	No	No
factory worker	Yes	No	No	No

As nouns, mill-hand and factory worker are synonyms defined as:

mill-hand (noun)	factory worker (noun)
a workman in a mill or factory	a workman in a mill or factory