ZIGGURAT

- A temple tower of the ancient Assyrians and Babylonians, having the form of a terraced pyramid of successively receding stories.

Z10 - I1 - G2 - G2 - U1 - R1 - A1 - T1 has 19 points in Scrabble!

Z10 - I1 - G3 - G3 - U2 - R1 - A1 - T1 has 22 points in Words with Friends!

Found in the OTCWL2014, SOWPODS, ENABLE, and WWF dictionaries