"constant variable(s)" is an oxymoron. Maybe just
"constants", or else "locked variables" if these can start as regular variables
and change status afterwards?
The thing about oxymorons is that they're only APPARENTLY contradictory. They usually occur as the result of applying clarifying descriptions to a standardized term, which is exactly what happened here. If the meaning is clear, there's nothing wrong with them. And "constant variable" is a common, well-understood term in computer programming, so using anything BESIDES that would be MORE confusing than the oxymoronic usage.
/s/ Adam
