ACAS stands for the Advisory, Conciliation and Arbitration Service, which is a UK-based organisation that provides guidance and support on employment-related disputes. Synonyms for ACAS include mediation service, employment advice centre, conciliation service, dispute resolution service, and negotiation centre. These terms refer to organisations or services that provide assistance to employers and employees when it comes to resolving conflicts related to work, such as disputes over wages, hours, or conditions. The goal of these services is to facilitate communication between parties and ensure fair and just outcomes that benefit both sides. Whatever term is used, the key is to recognise the importance of effective communication and collaboration in resolving workplace disputes and maintaining a positive working environment.