ZEROTH

- Of or relating to the ordinal number matching the number 0 in a series: the zeroth power of 10.

Z10 - E1 - R1 - O1 - T1 - H4 has 18 points in Scrabble!

Z10 - E1 - R1 - O1 - T1 - H3 has 17 points in Words with Friends!

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