interruption vs cut-in

interruption and cut-in both are nouns.

Word	Noun	Adjective	Verb	Adverb
interruption	Yes	No	No	No
cut-in	Yes	No	No	No

As nouns, cut-in is a hyponym of interruption; that is, cut-in is a word with a more specific, narrower meaning than interruption:

interruption: an act of delaying or interrupting the continuity
cut-in: (film) a still picture that is introduced and that interrupts the action of a film

interruption (noun)	cut-in (noun)
an act of delaying or interrupting the continuity	(film) a still picture that is introduced and that interrupts the action of a film
some abrupt occurrence that interrupts an ongoing activity	(broadcasting) a local announcement inserted into a network program
a time interval during which there is a temporary cessation of something