buffer store vs random access memory

buffer store and random access memory both are nouns.

Word	Noun	Adjective	Verb	Adverb
buffer store	Yes	No	No	No
random access memory	Yes	No	No	No

buffer store (noun)	random access memory (noun)
(computer science) a part of RAM used for temporary storage of data that is waiting to be sent to a device; used to compensate for differences in the rate of flow of data between components of a computer system	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