Four letter word with X

• X-ray

  Type of radiation used for medical imaging

• Xbox

  Video game console made by Microsoft

• Xmas

  Informal abbreviation for Christmas

• Xeon

  Brand of processors by Intel

• X-RAY

  Uppercase version of “X-ray”; valid word

• XMAS

  Uppercase form of "Xmas", short for Christmas

• Xylem
• X-Mas
• x men
• X-box

The words in the list Four letter word with X come from players of the word game Categories game.