X rays to Xanthin Xanthine to Xanthodontous Xanthogen to Xanthoproteic Xanthoprotein to Xanthoxylene Xanthoxylum to Xenogenesis Xenogenetic to Xeraphim Xeres to Xerophthalmy Xiphias to Xiphoid Xiphoidian to Xylate Xylem to Xylitone Xylo- to Xylography Xyloid to Xylophilan Xylophilous to Xylotomist Xylotomous to Xyster Xystus to Xystus