renewal vs repetition

renewal and repetition both are nouns.

Word	Noun	Adjective	Verb	Adverb
renewal	Yes	No	No	No
repetition	Yes	No	No	No

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

Other hypernyms of renewal include repeating.

renewal (noun)	repetition (noun)
the conversion of wasteland into land suitable for use of habitation or cultivation	the act of doing or performing again
the act of renewing	the repeated use of the same word or word pattern as a rhetorical device
filling again by supplying what has been used up	an event that repeats