@vonny,
Xenophobe, well, maybe in the White House living room. All right, Boo! If this one is kicked off then I've got another one. Xylem, as in the woody part of a tree, except in Hunding's and Siglinde's living room in Die Walkure where an ash tree is growing there with a sword stuck in it. Too obscure?
Then you try getting an x word.