desideratum(noun: Something considered necessary or desirable) wordsite

http://wordsmith.org/awad/index.html

today's word: thrasonical:adjective: Bragging or boastful.
yesterday's word: Jeeves: noun: A personal servant, especially one who is resourceful and reliable.

They have a word of the day subscription email feature and they have expansive archive of words a rather cornucopia of words its very useful if you 1. want to sound smart/confuse people 2. writing papers for school,job,etc
3. its just good to know so you don't have always use the same words and phrases all the time.