I had to look this up. Our mortgage company referred to me and Rachelle as MORTGAGORS, magical beasts which I initially thought might be related to the OWLBEAR, but which turn out instead to be a closer cousin to the frumious BANDERSNATCH. Who knew?
We are probably not the only mating pair of MORTGAGORS the bank has in captivity, upon reflection.

So, if you have a conventional loan with them, would you be a LOANOR?
It must be fun to have an account with them. Then you can say, "Don't mess with me! I'm an ACCOUNTOR!"
The mortgage agreement with them must be fun reading!