I don't see the utility in going out of the way to inject extra obfuscatory language just to describe it

It's only obfuscatory if you don't know what the terms mean :-) If you do then the utility is more information on the intent.

If somebody refers to a curried function then I know that they're going to be taking a function and specialising it by freezing one of its arguments. This tells me more than if they had referred to it as a closure.