Aren't Catholic priests generally refered to as "Father", as in Father Flannigan (of Boys Town fame)?
May be adressed as "Father" in speech, but the proper written title is "Reverend or Rev."
It's "The Reverend", not just "Reverend".
A subtle distinction, but we wince when we hear someone styling themself as "Reverend", as in "Reverend Jesse Jackson".
I have also seen priests addressed in writing as "Fr.", I thought it meant "Friar", at first, was embarrassed later at my mistake.