- xerox machine
- xga
- xhosa
- xi
- xi particle
- xia
- xilite
- xin
- xiphiternum
- xiphocostal
- xiphodidymus
- xiphodynia
- xiphoid
- xiphoidprecess
- xiphophagotomy
- xl
- xmas
- xmodem
- xms
- xon
- xy charts
- xybionic
- xylanthrax
- xylanthtite
- xylem
- xylen
- xylene
- xylenes
- xylenol
- xylidine
- xylocarp
- xylocarpous
- xylograph
- xylographer
- xylography
- xyloid
- xylol
- xylolite
- xylometazoline
- xylonite
- xylopal
- xylophagous
- xylophilous
- xylophone
- xyloretinite
- xylose
- xylosuria
- xylotile
- xyphoid
- xyster
- xytolite