The term 'TAPE SPOOL' can be summarized as a 'REEL' which is a four letter word. A tape spool is a cylindrical object used to store and play back audio or video tapes. It is typically made of plastic or metal and has a central hole for the tape to be wound around. The spool is placed in a cassette or other device and the tape is wound around it, allowing the user to play back the audio or video.