repetition vs anaphora

repetition and anaphora both are nouns.

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

As nouns, anaphora is a hyponym of repetition; that is, anaphora is a word with a more specific, narrower meaning than repetition:

repetition: the repeated use of the same word or word pattern as a rhetorical device
anaphora: repetition of a word or phrase at the beginning of successive clauses

repetition (noun)	anaphora (noun)
the act of doing or performing again	using a pronoun or similar word instead of repeating a word used earlier
the repeated use of the same word or word pattern as a rhetorical device	repetition of a word or phrase at the beginning of successive clauses
an event that repeats