I've argued before that congestion pricing (or charging) is a terrible term for anything that you want someone to support. It literally implies "paying for congestion," so it belongs to that set of terms that suggest we should pay for something we hate, e.g death taxes and traffic fines.
"Congestion pricing" also sounds punitive. When the Sydney Morning Herald asked me to join a discussion of the topic a couple of years ago, they framed the question as: "Should motorists pay for the congestion the cause?" This is a reasonable inference from the term congestion pricing, and yet a totally backward and schoolmarmish description of what congestion pricing buys.
In short, congestion pricing (or charge) sounds like a term coined by its opposition.
I have argued before that the term should be decongestion pricing, because escape from congestion is what the price buys, from the user's point of view. And it's the user who needs to be convinced that this is a purchase, not a tax. Finally, it has to be framed in a way that doesn't imply that it's only for the rich. People who like a class-conflict frame will never let go of the term "Lexus lanes," which is why I'd avoid vaguely upscale terms like "premium."
In any case, over on Twitter, Eric Jaffe of the Atlantic Cities (@e_jaffe) is soliciting your suggestions. (Or your votes for mine!) Another idea that meets my goals -- to describe this as a purchase rather than a tax or penalty, and to describe it from the user's point of view -- is "road fares," by @larrylarry.