repetition vs repeating

repetition and repeating both are nouns.

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

As nouns, repetition and repeating are synonyms defined as:

repetition (noun)	repeating (noun)
the act of doing or performing again	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