Another Crazy Word...

Here's a new one I just learned:

UINTAITE n. a variety of asphalt

Interesting things about this word:
1. All 1 point tiles.
2. Cannot be formed from a 7 + a tile.
3. UINTAHITE is also good (I assume it's an alternate spelling?)
4. The only other word (as far as I can tell) that starts with UI in the TWL is another 9: UITLANDER.