In my geology days I never learned a one word name for that kind of outcrop. I'd call it something like "glacially eroded (or abraded) bedrock". A geologist would probably end up talking more about things like chatter marks or glacial striations.
Whaleback! That's a good word. Descriptive. The picture is of hälleberg. As Wikipedia describes it in English: "ice-smoothed bedrock bumps which lack the steep, plucked lee side faces are referred to as whalebacks or rock drumlins."
Hälleberg is, by the Swedish definition, "a place where the outcrop is visible and not covered with earth, buildings nor growth." Such places are in Scandinavia usually polished and rounded, as a reminder of the Ice Age.
Flyggberg, is the not quite the same as hälleberg. They are two different phenomena, caused by the Ice Age. What they have in common is that the reciding glacier made them.
Hälleberg is always flat, while flyggberg has a precipice. The precipice is on the leeward side of the dominating direction of the icemovement.'
There's a mountain named Flyggberget. It's made out of diabas. (It's not the one in the image above, that's the Bergvattsberget.)