repeat vs reduplicate

repeat is a noun but reduplicate is not a noun.

Word	Noun	Adjective	Verb	Adverb
repeat	Yes	No	Yes	No
reduplicate	No	No	Yes	No

As verbs, repeat and reduplicate are synonyms defined as:

Other synonyms of repeat include double, duplicate, replicate.

As verbs, reduplicate is a hyponym of repeat; that is, reduplicate is a word with a more specific, narrower meaning than repeat:

Other hyponyms of repeat include copy, replicate, recapitulate, geminate.

repeat (noun)	reduplicate (noun)
an event that repeats

repeat (verb)	reduplicate (verb)
happen or occur again	make or do or perform again
to say, state, or perform again	form by reduplication
to say again or imitate
make or do or perform again
repeat an earlier theme of a composition
do over