instant replay vs repetition

instant replay and repetition both are nouns.

Word	Noun	Adjective	Verb	Adverb
instant replay	Yes	No	No	No
repetition	Yes	No	No	No

As nouns, repetition is a hypernym of instant replay; that is, repetition is a word with a broader meaning than instant replay:

instant replay: the immediate rebroadcast of some action (especially sports action) that has been recorded on videotape
repetition: the act of doing or performing again

Other hypernyms of instant replay include repeating.

instant replay (noun)	repetition (noun)
the immediate rebroadcast of some action (especially sports action) that has been recorded on videotape	the act of doing or performing again
	the repeated use of the same word or word pattern as a rhetorical device
	an event that repeats