full complement vs men

full complement and men both are nouns.

Word	Noun	Adjective	Verb	Adverb
full complement	Yes	No	No	No
men	Yes	No	No	No

As nouns, men is a hypernym of full complement; that is, men is a word with a broader meaning than full complement:

Other hypernyms of full complement include hands, manpower, work force, workforce.

full complement (noun)	men (noun)
number needed to make up a whole force	the force of workers available