The term "appeaser" can be defined as someone who seeks to pacify aggression or avoids conflict by making concessions to others. Synonyms for appeaser include pacifier, peacemaker, conciliator, mediator, negotiator, compromiser, assuager, and placater. A pacifier is someone who tries to calm down an angry or upset person, while a peacemaker seeks to encourage peaceful resolution of conflicts. A conciliator attempts to reconcile differences between opposing parties, while a mediator serves as a neutral third party to help resolve disputes. A negotiator tries to reach mutually beneficial agreements, while a compromiser is willing to make concessions to find a middle ground. An assuager aims to ease tensions, while a placater tries to satisfy others' demands to prevent conflict.