blackout vs unconsciousness

blackout and unconsciousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackout	Yes	No	No	No
unconsciousness	Yes	No	No	No

As nouns, unconsciousness is a hypernym of blackout; that is, unconsciousness is a word with a broader meaning than blackout:

blackout: a momentary loss of consciousness
unconsciousness: a state lacking normal awareness of the self or environment

blackout (noun)	unconsciousness (noun)
a momentary loss of consciousness	a state lacking normal awareness of the self or environment
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