52. The non-transitory computer readable storage medium as in claim 41 , wherein the instructions for automatically using the phrase thesaurus database to construct equivalent phrases further comprise: instructions for selecting a combination of one or more phrases representing a formulated expression, wherein the phrases of the selected combination of one or more phrases are original phrases of the formulated expression; instructions for identifying an equivalent phrase for each of one or more original phrases of the formulated expression; and instructions for producing a new combination of one or more phrases representing the formulated expression, the new combination including at least one of the identified equivalent phrases, wherein the new combination the equivalent expression.
52. The non-transitory computer readable storage medium as in claim 41 , wherein the instructions for automatically using the phrase thesaurus database to construct equivalent phrases further comprise: instructions for selecting a combination of one or more phrases representing a formulated expression, wherein the phrases of the selected combination of one or more phrases are original phrases of the formulated expression; instructions for identifying an equivalent phrase for each of one or more original phrases of the formulated expression; and instructions for producing a new combination of one or more phrases representing the formulated expression, the new combination including at least one of the identified equivalent phrases, wherein the new combination the equivalent expression. 53. The non-transitory computer readable storage medium as in claim 52 , wherein: each phrase in the phrase thesaurus database is associated with a probability of occurrence; one or more original phrases has a plurality of equivalent phrases; and the instructions for identifying an equivalent phrase further comprise instructions for selecting an equivalent phrase having the highest probability of occurrence.