hard drive vs disc drive

hard drive and disc drive both are nouns.

Word	Noun	Adjective	Verb	Adverb
hard drive	Yes	No	No	No
disc drive	Yes	No	No	No

As nouns, hard drive and disc drive are synonyms defined as:

hard drive and disc drive: computer hardware that holds and spins a magnetic or optical disk and reads and writes information on it

Other synonyms of hard drive include disk drive, Winchester drive.

hard drive (noun)	disc drive (noun)
computer hardware that holds and spins a magnetic or optical disk and reads and writes information on it	computer hardware that holds and spins a magnetic or optical disk and reads and writes information on it