ZENITH

- The point on the celestial sphere that is directly above the observer.
- The upper region of the sky.
- The highest point above the observer's horizon attained by a celestial body.
- The point of culmination; the peak: the zenith of her career. See Synonyms at summit.

Z10 - E1 - N1 - I1 - T1 - H4 has 18 points in Scrabble!

Z10 - E1 - N2 - I1 - T1 - H3 has 18 points in Words with Friends!

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