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.

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WordNet will probably provide you with what you need.

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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