A dictionary-cum-thesaurus created for research into language. http://www.cogsci.princeton.edu/~wn/ The WordNet project includes the database itself and some software for querying it. WordNet is different from normal dictionaries in that it captures relationships between words; for instance, it knows that 'bird' is a subclass of 'animal' and a superclass of 'parrot', and that 'hot' is a synonym for 'warm' and the opposite of 'cold'.