There's a big difference between freehold on a new build estate and freehold on an older house, the former has various conditions attached.
But in all these cases we use the word "buy" to buy the car or house, just like we use the word "buy" to take in posession of a slab of electronics
I'm on board with the idea that there's a lot of arrangements in between full ownership and pure rental, as long as we have terms to describe the meaningful differences.