9. A similar word discrimination method for discriminating words that may be misrecognized because of their similarity, comprising the steps of: receiving voice data of input words; creating a learning dynamic recurrent neural networks (DRNN) sub-voice model, that uses a DRNN voice model, to obtain a specified DRNN output for the characteristic components of respective similar words showing a level of correctness in response to the voice data of input words; processing the DRNN output to establish a specified period in which the characteristic components of the input words are included in the DRNN output, when the DRNN output shows a level of correctness of a predetermined amount or greater; examining the characteristics of the voice data of said input words during the specified period; and discriminating between the input words and words that are similar to the input words on the basis of the examination.
9. A similar word discrimination method for discriminating words that may be misrecognized because of their similarity, comprising the steps of: receiving voice data of input words; creating a learning dynamic recurrent neural networks (DRNN) sub-voice model, that uses a DRNN voice model, to obtain a specified DRNN output for the characteristic components of respective similar words showing a level of correctness in response to the voice data of input words; processing the DRNN output to establish a specified period in which the characteristic components of the input words are included in the DRNN output, when the DRNN output shows a level of correctness of a predetermined amount or greater; examining the characteristics of the voice data of said input words during the specified period; and discriminating between the input words and words that are similar to the input words on the basis of the examination. 11. The similar word discrimination method of claim 9 wherein: the DRNN voice model creates correspondence between groups of words having similar word groups and generates a DRNN output showing the level of correctness at a predetermined level or greater for each of the similar word groups of the group of words.