The term 'hostilities ender' refers to a resolution that brings an end to hostilities between two or more parties. The three solutions to this crossword are TRUCE (5 letters), TREATY (6 letters), and PACT (4 letters). A TRUCE is an agreement between two or more parties to stop fighting for a certain period of time. A TREATY is a formal agreement between two or more parties that is legally binding. A PACT is a formal agreement between two or more parties that is not legally binding. All three solutions can be used to bring an end to hostilities between two or more parties.