haha.. missed that is that a word? i thought it was slang, that has become incorporated into the english language
Rhythm -- y doesn't act as a vowel there There are others, and I believe there are some Hawaiian words that don't have vowels, but are acceptable in Scrabble -- I forget what they are though . . .
"Rhythm" -- the "y" is pronounced like a soft "i" in "win"-- an unfamiliar word on this board, I know. You can also have "st" like in 1st Street, but I don't think that abbreviations count because they aren't full words.
Here you go. The dictionary of words without vowels: http://www.blueray.com/dictionary/consonant/index.html (It's amazing what you can find with a search engine)