4. The method of claim 3 further comprising: calculating a first string metric between the leading morpheme and the candidate word corresponding to the leading morpheme; calculating a second string metric between the trailing morpheme and the candidate word corresponding to the trailing morpheme; and combining the first and second string metric, wherein the combined usage is based on the combination of the first and second string metric.
4. The method of claim 3 further comprising: calculating a first string metric between the leading morpheme and the candidate word corresponding to the leading morpheme; calculating a second string metric between the trailing morpheme and the candidate word corresponding to the trailing morpheme; and combining the first and second string metric, wherein the combined usage is based on the combination of the first and second string metric. 6. The method of claim 4 further comprising: selecting a leading candidate word from the plurality of candidate words, wherein the leading candidate word corresponds to the leading morpheme; selecting a trailing candidate word from the plurality of candidate words, wherein the trailing candidate word corresponds to the trailing morpheme; and generating a possible definition of the identified portmanteau by combining a first definition that corresponds to the leading candidate word with a second definition that corresponds to the trailing candidate word, wherein the combined usage is based on the generated possible definition.