Word4app is a semantic Question and Answer ( Q&A) Application. This Semantically-Interlinked Online Communities (SIOC) enhanced application is designed to demonstrate the ability of accelerating the creation and reuse process of semantic internet data with easy-to-use user interfaces. In this process, Word4app feeds existing semantic data into the SIOC framework, where new semantic data are created and indexed by the communityCompared to existing social (semantic) net Q&A applications, Word4app inherently conforms to the SIOC specification. It provides Q&A based expert level quality answers, user’s experiences, friends auto-discovery, and semantic annotation for forum post content. Another distinctive feature of Word4App is that it enables users to subscribe to any resources having a URL as the question they are interested in. The relationships among users, topics, and posts are further visualized for analyzing the interest within the community.