blackout vs memory loss

blackout and memory loss both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackout	Yes	No	No	No
memory loss	Yes	No	No	No

As nouns, blackout and memory loss are synonyms defined as:

Other synonyms of blackout include amnesia.

blackout (noun)	memory loss (noun)
a momentary loss of consciousness	partial or total loss of memory
partial or total loss of memory
the failure of electric power for a general region
darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)
a suspension of radio or tv broadcasting