captive [captives](a person who has been captured) noun [UK: ˈkæp.tɪv] [US: ˈkæp.tɪv]
hostage [hostages](person given as a pledge or security) noun [UK: ˈhɒ.stɪdʒ] [US: ˈhɑː.stɪdʒ]
prisoner of war(combatant or soldier captured by an enemy power during or immediately after an armed conflict) noun [UK: ˈprɪz.nə(r) əv wɔː(r)] [US: ˈprɪ.zə.nər əv ˈwɔːr]