A Mishna in Shavuot says that one who curses another transgress a negative prohibition. and the Gemara Yerushalmi asks if he gets lashes for that?". The friends [peoples sitting in the Beit Midrash study hall] said, "No, because it is  a prohibition that has no act in it." R Yose said but switching one sacrifice for another and swearing a false oath also have no act in them and still he gets lashes.

I have been thinking about this Yeruhalmi. To me it seems clear R Yose is saying לוקים על לאו שאין בו מעשה one can get lashes for a prohibition that does not have an act in it. But that does not seem to be the way the Rambam and Raavad understand this subject because both say there is lashes for this prohibition and also agree that one does not get lashes for a prohibition that does not have an act in it. So they both go with R Yose but apparently for some other reason. I would imagine because of the Babylonian Talmud where there are special reasons why swearing and switching get lashes: one  is a verse, the other is an act and cursing is also a verse והפלא

What is hard to understand here is the Raavad  point to the Yerushalmi for the source of his law and there does not seem to be anything there that indicates what he says--that cursing is liable to  lashes only when using the special name of God [in laws of Sanhedrin ]. Also the Rambam seems also to be problematic since he says even using names used for God like "The Compassionate" is liable and that does not seem to e what that verse indicates.