Educational activity and University extension

Educational activity noun - The activities of educating or instructing; activities that impart knowledge or skill.

University extension and educational activity are semantically related. In some cases you can replace phrase "University extension" with "Educational activity", this phrases are similar.

University extension noun - An educational opportunity provided by colleges and universities to people who are not enrolled as regular students.

Educational activity and university extension are semantically related. You can use "Educational activity" instead a noun phrase "University extension".