CD-R is a type of recordable compact disc that allows users to record or store data, music, or other types of files onto the disc for later use. However, there are several synonyms for CD-R that can be used interchangeably. One popular term that can be used is the blank CD, which refers to the type of CD-R that has no data on it. Another term is the recordable CD, which is used to refer to the type of CD-R that is specifically designed for recording or storing data onto the disc. Other synonyms include the write-once CD, the CD-WORM, or the CD-RW. All these terms can be used to refer to CD-R.