I'm not a range officer, but here are a few that I can think of off the top of my head:
"At your ready"- Position one, gun in ready position pointed slightly down range but off target, before commencing fire
"Range Closed"- After all weapons have their actions open and deemed clear, and everyone is behind the clear line or away from their guns, then this is called to signify people can go get their targets safely.
"Range Open"-All people are back behind the firing line, no one may now go passed the line. Shooters may go back to their positions.
"Shooters to the Firing Line."- Step to you position. Unpack but not load.
"You may load."- You can load your firearm but no further action can be taken until commanded.
"Unload with action open"- Unload the firearm of all ammunication and present the weapon in such a manner as to show the action and chamber are empty.
"Commence firing."- You may unpack or pack and start shooting.
"Step back from the firing line."-Typically this is called after a cease fire, or unload call. The shooters must step back from the firing line, typically behind another line, and wait for the range master to inspect the situation or condition of firearms before calling an closed range.
“You may go forward to change targets." Range is closed and the shooters can go retrieve targets
On the note of "Cease Fire", it can be called by anyone at any time on the line. And it is usually common practice to repeat the command if you hear it so that everyone on the line is gauranteed to hear the command and stop action.
On the note of stopping the individual in their current position. I have sometimes heard the words "Hold Action" or "Cease Action" used for this purpose. Again, I'm not an official range master, these are just the words I've gotten used to hearing, sometimes from NRA or POST instructors or when I'm out shooting with people who do a bunch of competitive/military range shooting. Every range seems to have slight variations on the same concepts. I'm sure their is probably a more official list, but since no one had commented yet I figured I would throw in my two cents. These are the typical commands I used when putting a newby on the line for the first time.
They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
---Benjamin Franklin, Historical Review of Pennsylvania, 1759.