Synonyms of topic

1. subject, topic, theme, message, content, subject matter, substance: usage: the subject matter of a conversation or discussion; "he didn't want to discuss that subject"; "it was a very sensitive topic"; "his letters were always on the theme of love"
2. topic, subject, issue, matter, content, cognitive content, mental object: usage: some situation or event that is thought about; "he kept drifting off the topic"; "he had been thinking about the subject for several years"; "it is a matter for the police"