forum [forums](place for discussion) noun [UK: ˈfɔː.rəm] [US: ˈfɔː.rəm]
symposium [symposiums](a conference or other meeting for discussion of a topic, especially one in which the participants make presentations) noun [UK: sɪm.ˈpəʊ.zɪəm] [US: sɪmˈpo.ʊ.zɪəm]