WordNet® is a large lexical database of English. Nouns, verbs, adjectives and adverbs are grouped into sets of cognitive synonyms (synsets), each expressing a distinct concept.
P. Chapman, G. Stapleton, J. Howse, und I. Oliver. 2011 IEEE Symposium on Visual Languages and Human-Centric Computing (VL/HCC), Seite 87-94. (September 2011)