RAM disk vs random access memory

RAM disk and random access memory both are nouns.

Word	Noun	Adjective	Verb	Adverb
RAM disk	Yes	No	No	No
random access memory	Yes	No	No	No

RAM disk (noun)	random access memory (noun)
(computer science) a virtual drive that is created by setting aside part of the random-access memory to use as if it were a group of sectors	the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible