Message Oriented Middleware (MOM) is getting popular along with the development of heterogeneous platforms and applications. Most Message Oriented Middleware supports Publish/Subscribe scheme for message interoperation and it usually matches topics directly by matching keywords. Recent Semantic Message Oriented Middleware base on ontology which requires knowledge to be predefined. In this paper, we provide a semantic method for matching topics (keywords) by using a lexical database (WordNet). By expanding the publishing queries among topics (keywords), highly related topics can also be subscribed all at once. As a result, we propose a Semantic Publish/Subscribe Message Oriented Middleware which is suitable for many general purposes without special configurations.