reduplication vs syllable

reduplication and syllable both are nouns.

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

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

reduplication (noun)	syllable (noun)
the act of repeating over and again (or an instance thereof)	a unit of spoken language larger than a phoneme
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