LNB is a low noise block. LNBF is a low noise block feed. They are names for the same type of signal receiving apparatus, there is no distinction in the naming.
DPP is a Dish Pro Plus LNB or LNBF. The hybrid is a DPH LNB or LNBF.
It's technically more accurate to say "LNBF" than "LNB." The LNBF...