'''GHZ''' or '''GHz''' may refer to:
* Chabab Ghazieh SC, a Lebanese association football club * Gigahertz (GHz), unit of frequency * Greenberger–Horne–Zeilinger state, a specific entangled quantum state of three or more particles ** GHZ experiment, an experiment associated with such a state * Galactic Habitable Zone, the region of a galaxy that is favorable to the formation of life * Green Hill Zone, the first level in ''Sonic the Hedgehog''
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