WordNet

A number of years ago when looking at language Taxonomies I had cause to look at Princeton's WordNet, " ... a large lexical database of English, developed under the direction of George A. Miller. Nouns, verbs, adjectives and adverbs are grouped into sets of cognitive synonyms (synsets), each expressing a distinct concept. Synsets are interlinked by means of conceptual-semantic and lexical relations. The resulting network of meaningfully related words and concepts can be navigated with the browser.... " . Just started to look at it again for a project. It can be used as a means to establishing the basis for a taxonomy of language. It seems it is no longer being updated.