Joint-Stool is a 11 letter English word. It's valid Scrabble word worth 12 points. It's valid Words with friends word worth 15 points.
You can make 213 anagrams from letters in joint-stool (-ijlnooostt).
late Middle English word dating back to 1400-50
Here's a joint stool; sit down and quaff out of Lady Macbeth's gilt goblet.
12
15