The Oxford English Dictionary has launched something very charming and playful: a campaign to save forgotten words from obsolescence. As you move your mouse over the collage of words they call out for you to pick them, and when you click, a definition pops up, as well as an invitation to adopt it. I just adopted primifluous. I also learned that vitamin G was the original name for riboflavin.
You can also sign up for the word of the day email program, and read handy suggestions about how to use these forgotten words in your day to day life (or in Scrabble). Adopt your own here.