memory vs screen memory

memory and screen memory both are nouns.

Word	Noun	Adjective	Verb	Adverb
memory	Yes	No	No	No
screen memory	Yes	No	No	No

As nouns, screen memory is a hyponym of memory; that is, screen memory is a word with a more specific, narrower meaning than memory:

memory: something that is remembered
screen memory: an imagined memory of a childhood experience; hides another memory of distressing significance

Other hyponyms of memory include reminiscence, recollection, engram, memory trace, confabulation.

memory (noun)	screen memory (noun)
an electronic memory device	an imagined memory of a childhood experience; hides another memory of distressing significance
the power of retaining and recalling past experience
the cognitive processes whereby past experience is remembered
something that is remembered
the area of cognitive psychology that studies memory processes