blackout vs intermission

blackout and intermission both are nouns.

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

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

blackout: a suspension of radio or tv broadcasting
intermission: a time interval during which there is a temporary cessation of something

Other hypernyms of blackout include break, interruption, pause, suspension.

blackout (noun)	intermission (noun)
a momentary loss of consciousness	the act of suspending activity temporarily
partial or total loss of memory	a time interval during which there is a temporary cessation of something
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