1. A method for vocabulary integration in speech recognition, comprising: converting a plurality of speech signals into a plurality of words using a processor; applying a plurality of confidence scores to the plurality of words; classifying the plurality of words into a plurality of classifications based on classification criteria and the confidence score for each one of the plurality of words; determining if one or more of the plurality of words are unrecognized based on the plurality of classifications; classifying each of the one or more unrecognized words based on additional classification criteria; detecting a match for each of the one or more unrecognized words based on the additional classification criteria; and upon detecting a match for an unrecognized word, converting at least a portion of the plurality of speech signals corresponding to the unrecognized word into a plurality of recognized words.