This is the 7654th most frequent Turkish word.
hz
"Hz" is an abbreviation for "Hazret," meaning "honorific title for a respected person" (e.g., Saint, Prophet).
Here, 'Hz.' is an abbreviation of the word 'Hazreti' (Honorable), used as a title of respect for religious figures.
Hz. Muhammed peygamberdir.
Prophet Muhammad is a prophet.
In this context, 'hız' means 'speed' or 'velocity', indicating the rate at which something moves.
Makinenin hızını ayarladım.
I adjusted the speed of the machine.
Here, 'hız' again refers to 'speed', but relates to the quickness of an actor's actions on stage.