men vs workforce

men and workforce both are nouns.

Word	Noun	Adjective	Verb	Adverb
men	Yes	No	No	No
workforce	Yes	No	No	No

As nouns, men and workforce are synonyms defined as:

Other synonyms of men include hands, manpower, work force.

men (noun)	workforce (noun)
the force of workers available	the force of workers available