hard drive vs disk drive

hard drive and disk drive both are nouns.

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

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

hard drive and disk 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 disc drive, Winchester drive.

hard drive (noun)	disk 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