Reduplication

thumb|220x124px | right | Occurrence of reduplication across world languages In linguistics, reduplication is a morphological process in which the root or stem of a word, part of that, or the whole word is repeated exactly or with a slight change.

A tautonym is a scientific name of a species in which both parts of the name have the same spelling, such as Rattus rattus. The first part of the name is the name of the genus and the second part is referred to as the specific epithet in the International Code of Nomenclature for algae, fungi, and plants and the specific name in the International Code of Zoological Nomenclature.

phonological doubling of initial consonants

Shm-reduplication or schm-reduplication is a form of reduplication originating in Yiddish in which the original word or its first syllable (the base) is repeated with the copy (the reduplicant) beginning with the duplifix shm- (sometimes schm-), pronounced . The construction is generally used to indicate irony, sarcasm, derision, skepticism, or lack of interest with respect to comments about the discussed object. In general, the new combination is used as an interjection.