action replay vs repeating

action replay and repeating both are nouns.

Word	Noun	Adjective	Verb	Adverb
action replay	Yes	No	No	No
repeating	Yes	No	No	No

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

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

Other hypernyms of action replay include repetition.

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