reduplication vs repeating

reduplication and repeating both are nouns.

Word	Noun	Adjective	Verb	Adverb
reduplication	Yes	No	No	No
repeating	Yes	No	No	No

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

Other hypernyms of reduplication include repetition.

reduplication (noun)	repeating (noun)
the act of repeating over and again (or an instance thereof)	the act of doing or performing again
a word formed by or containing a repeated syllable or speech sound (usually at the beginning of the word)
the syllable added in a reduplicated word form
repetition of the final words of a sentence or line at the beginning of the next