Websites with X

• xyz.com

  Legit site for the .xyz domain registry.

• Xerox

  Known company; their website is xerox.com.

• xray.com

  xray.com is a plausible medical/imaging site.

• x.com

  Real, famous domain for X (formerly Twitter).

• xylophone.com

  Likely a music/learning site domain concept.

• xerox.com

  Official website of Xerox; well-known.

The words in the list Websites with X come from players of the word game City, Country, River.