Silent conversation, a truly beautiful flash game that has you trying to touch as many words of a poem as you can. (Yes it does have Williams Carlos Williams) [more inside]
Viz Comics have some wonderfully puerile games for you to enjoy- and needless to say, probably NSFW. Try your hand at Roger's Profanisaurus Hangman [Previously] Or play a round of Lesbian Tennis (PC only download, Mac users, you're not missing much). Perhaps you would like to keep a virtual pet, perhaps a Sim City style holiday resort game is more your cup of tea (Download). Full collection here.
Visuwords - an online graphical dictionary that uses Princeton's WordNet. Input a word and watch the branching associations.
Fsaturday Flash Fun: CryptoQuote. Other word games featured at East of the Web are the Tetris-like PopWord (and its multiplayer companion [beginner and advanced, respectively]), the MasterMind-like CodeWord, and the vaguely Scrabble-ish 8 Letters in Search of a Word.