disk drive vs hard drive

disk drive and hard drive both are nouns.

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

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

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

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

disk drive (noun)	hard 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