showdown
noun /ˈʃəʊdaʊn/
  /ˈʃəʊdaʊn/
 [usually singular]- an argument, a fight or a test that will settle a disagreement that has lasted for a long time
- Management are facing a showdown with union members today.
 - Fans gathered outside the stadium for the final showdown (= the game that will decide the winner of the competition).
 
Extra ExamplesTopics Opinion and argumentc2- He was now strong enough to force a showdown with them.
 - Of course I'll support you if it comes to a showdown.
 - The council is heading for a showdown over the new proposals.
 - the semi-final showdown with Australia last month
 - the title showdown between Arsenal and United
 
Oxford Collocations Dictionaryadjective- climactic
 - final
 - dramatic
 - …
 
- have
 - avert
 - avoid
 - …
 
- showdown against
 - showdown between
 - showdown over
 - …
 
- it comes to a showdown