Question

what are reduplicative words

Answer 1

A reduplicative is a word or lexeme that contains two identical or very similar parts.It can be thought as compound word formation.The second part is identical with the first,like-- pooh-pooh, or repeats the first part.

Answer 2

reduplicative words are words in which  the second part is identical to the first "pooh-pooh" or repeats the first part with a change of vowel "riff-raff" or of consonant "teeny-weeny"