local memory vs memory board

local memory and memory board both are nouns.

Word	Noun	Adjective	Verb	Adverb
local memory	Yes	No	No	No
memory board	Yes	No	No	No

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

local memory: The memory used by a single CPU or allocated to a single program or function.
memory board: an electronic memory device

Other hypernyms of local memory include computer memory, computer storage, memory, storage, store.

local memory (noun)	memory board (noun)
The memory used by a single CPU or allocated to a single program or function.	an electronic memory device