store vs memory device

store and memory device both are nouns.

Word	Noun	Adjective	Verb	Adverb
store	Yes	No	Yes	No
memory device	Yes	No	No	No

As nouns, memory device is a hypernym of store; that is, memory device is a word with a broader meaning than store:

Other hypernyms of store include computer hardware, hardware, storage device.

store (noun)	memory device (noun)
a mercantile establishment for the retail sale of goods or services	a device that preserves information for retrieval
a depository for goods
an electronic memory device
a supply of something available for future use

store (verb)	memory device (verb)
keep or lay aside for future use
find a place for and put away for storage