Academic department and Department of mathematics

Academic department noun - A division of a school that is responsible for a given subject.

Department of mathematics and academic department are semantically related. In some cases you can replace phrase "Department of mathematics" with "Academic department", this phrases are similar.

Department of mathematics noun - The academic department responsible for teaching and research in mathematics.

Academic department and department of mathematics are semantically related. You can use "Academic department" instead a noun phrase "Department of mathematics".