WordNet is described as '® 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. Synsets are interlinked by means of conceptual-semantic and lexical relations' and is an app in the Education & Reference category. There are six alternatives to WordNet for a variety of platforms, including Windows, Online / Web-based, Android, iPhone and iPad. The best alternative is WordWeb, which is free. Other great apps like WordNet are Artha (Free, Open Source), TemaTres (Free, Open Source), Classic Thesaurus (Free) and VerbAce (Freemium).
WordWeb is an international English dictionary and thesaurus program for Microsoft Windows, iOS, Android and Mac OS X. Available for download online, the program is partly based on the WordNet database.
Artha is a handy thesaurus based on WordNet with distinct features like global hotkey look-up, passive desktop notifications, regular expression based search, etc.. Artha may be used as a free open-source replacement to the proprietary WordWeb Pro.
Classic Thesaurus is a fast, convenient and comprehensive online thesaurus. It's crowdsourced, meaning it has been built by a community of writers for writers. The synonymic and other associations are suggested, rated and used by its visitors.