interrupt vs discontinue

interrupt is a noun but discontinue is not a noun.

Word	Noun	Adjective	Verb	Adverb
interrupt	Yes	No	Yes	No
discontinue	No	No	Yes	No

As verbs, discontinue is a hypernym of interrupt; that is, discontinue is a word with a broader meaning than interrupt:

Other hypernyms of interrupt include break, break off, stop.

interrupt (noun)	discontinue (noun)
a signal that temporarily stops the execution of a program so that another procedure can be carried out

interrupt (verb)	discontinue (verb)
terminate or end	prevent completion
destroy the peace or tranquility of	put an end to a state or an activity
interfere in someone else's activity	come to or be at an end
make a break in