Xerxes (Emperor of Babylon, where the Hanging Gardens were)
Okay, okay, it's a stretch. :-D
s-tr-et-ch - a good one though! There's probably some lethal pesticide called X824 or something and a Xerophyte is a plant adapted to arid conditions
Yucca
Zinnia
Battlefields/ locations
ANZIO
Ezra Church, Battle of the Poorhouse (Georgia). See:
http://americancivilwar.com/statepic/ga/ga018.html
Koh Chang (France vs Thailand - Jan. 17 1941)