Cylinder and Compact disc

Cylinder noun - A surface generated by rotating a parallel line around a fixed line.

Compact disc and cylinder are semantically related In some cases you can replace phrase "Compact disc" with "Cylinder", this terms are similar.

Compact disc noun - A digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser.

Cylinder and compact disc are semantically related in recording of music or speech topic. You can use "Cylinder" instead a noun phrase "Compact disc".