The term 'ON A CRUISE, SAY' can be solved by the four-letter word 'ASEA'. ASEA stands for the Association of Southeast Asian Nations, which is an intergovernmental organization made up of ten countries in Southeast Asia. The organization was established in 1967 to promote economic growth, social progress, and cultural development among its member states. It also works to strengthen regional peace and security, and to promote collaboration and mutual assistance on matters of common interest.