cossack: a member of a Slavic people living in southern European Russia and Ukraine and adjacent parts of Asia and noted for their horsemanship and military skill; they formed an elite cavalry corps in czarist Russia
slav: any member of the people of eastern Europe or Asian Russia who speak a Slavonic language
identikit: a likeness of a person's face constructed from descriptions given to police; uses a set of transparencies of various facial features that can be combined to build up a picture of the person sought