Software program for realtime reporters and captioners that lists many diverse vocabulary lists.
Dictionary Society of North America
An international organization of librarians, booksellers, translators, linguists, publishers, writers, journalists, and collectors. Founded in 1975 to further research in dictionary making, study, collection, and use. Member of the American Council of Learned Societies.
Farlex Free Dictionary
Collection of dictionaries by subject including medical and legal together with free and subscription encyclopedias, in ten languages.
Looks up multiple words simultaneously using several databases including Webster's, Easton's, Wordnet, and the Devil's Dictionary.