1. A computer-implemented method for creating subject matter synonyms from definitions of terms defined in a subject matter glossary, comprising: extracting from a subject matter glossary definitions of terms defined in the subject matter glossary; determining a plurality of confidence scores by applying natural language processing to the definitions extracted from the subject matter glossary, wherein each confidence score represents a likelihood that two terms defined in the subject matter glossary are synonyms; building a subject matter thesaurus based on the confidence scores.