Hello Nicolas,
Not exactly, read the definition in KBOOT release notes:
(C:\Freescale\FSL_Kinetis_Bootloader_1_2_0\doc\Kinetis Bootloader v1.2.0 Release Notes.pdf)

So in summary:
- Bootloader (tower or freedom): Bootloader firmware that resides in Flash and can be used multiple times.
- Flashloader_loader + Flashloader: The firmware you get from the "flashloader_loader" project can be programmed to the K22 with an external tool (Jlink, U-Multilink, OpenSDA,...) and you get a one-time loader. As stated in the text box, the flashloader project must be built first.
I hope this clarifies.
Regards!
Jorge Gonzalez