The Historical Thesaurus of English
The Historical Thesaurus of English contains almost 800,000 words from Old English to the present day arranged into detailed semantic hierarchies. It is primarily based on the second edition of the Oxford English Dictionary and its Supplements, incorporating material from A Thesaurus of Old English. The online version enables users to view the meanings of a word through time, their synonyms, and their relationship to words of more general or more specific meaning. The Thesaurus is an unparalleled resource for research on the English language including its social and cultural history, showing the development of concepts through their associated vocabulary.