NLP and english dictionary database?

Is there an open dictionary database where I can get at minimum a table of the sort: word | part of speech ?

Ideally I would also like antonym and synonym links t开发者_开发知识库o other words.

WordNet will probably provide you with what you need.

you can check cmu dictionary it contains word and its phonetic transcriptions. it did not have links to antonyms and synonyms when i used it last time