1. A search result providing system, comprising: a storage device; an original word-allomorph maintaining unit configured to store an original word, a loan word corresponding to the original word, and a first allomorph of the original word on the storage device; a related loan word searching unit configured to find a related loan word from the original word-allomorph maintaining unit in response to a query, wherein the related loan word is related in pronunciation to at least one of the original word, the loan word, and the first allomorph; and a related loan word providing unit configured to expose the related loan word as a search result.