ZK

Zener Knee (Academic & Science » Electronics)

** Zum Kotzen (International » German)

** Zero Kool (Internet » Chat)

* Zero Kelvin (Academic & Science » Chemistry)

* Zillion Kajillion Rhymes (Business » Firms)

* Zero Knight (Miscellaneous » Science Fiction)

* Zonnar Krasnagorsk (Governmental » Military)

* Zoid Kingdom (Miscellaneous » Science Fiction)