Showdown

Noun

 * 1) The final battle between two nemeses, in which there can be but one victor
 * 2) The final round in a poker match, where the all remaining players' cards have to be put down on the table and shown

Thesaurus
antagonism, antipathy, antithesis, clashing, climax, collision, conflict, confrontation, contradiction, contradistinction, contraindication, contraposition, contrariety, contrast, counterposition, cross-purposes, disagreement, discrepancy, hostility, inconsistency, inimicalness, moment of truth, oppositeness, opposition, opposure, oppugnance, oppugnancy, perversity, polarity, repugnance

Etymology
From show: + down:.

Translations

 * Finnish: välienselvittely
 * Icelandic: lokauppgjör


 * Russian: финальный поединок, решающая схватка
 * Spanish:


 * Russian: раскрытие карт