English Dictionary and Thesaurus app is based on WordNet 3.0 a large lexical database of English with over 140,000 entries. Nouns, verbs, adjectives and adverbs are grouped into sets of cognitive synonyms, interlinked by means of conceptual-semantic and lexical relations. Definition of words are straightforward and words are linked to other words in terms of synonyms, antonyms and similar words together with hyponyms and hyperlinks within the group. Fast search, easy and functional user interface.