labour force(people available for employment) noun [UK: ˈleɪb.ə(r) fɔːs] [US: ˈleɪb.r̩ ˈfɔːrs]
manpower [manpowers](power exerted by a single person) noun [UK: ˈmæn.paʊə(r)] [US: ˈmæn.ˌpɑː.wər]Manpower was no problem. = La manodopera non era un problema.
workforce [workforces](workers employed by an organization) noun [UK: ˈwɜːk.fɔːs] [US: ˈwɝːk.fɔːrs]