Xchange
Xcerpts
Xenophobia
Xchange2
Xemplary
Xponential
FlummoX
Xplanation

" We obtain the concept, as we do the form, by overlooking what is individual and actual; whereas nature is acquainted with no forms and no concepts, and likewise with no species, but only with an X which remains inaccessible and undefinable for us." - Nietzsche