Only for Americans. In British English, it's "MISS isle", and "MISSul" is
a church book. I'm not Christian and I am not sure of exactly what's in a
_missal_ but it's prayers or something.
I do not know if American English even has missals. They're old fashioned
things these days, I think. But in my dialect, "missile" and "missal" are
two different words with 2 different sounds, which means that when I hear
Americans talking about the fast moving weaponry what I hear is that they
are launching prayer books at someone. It's not a very common word and so
I keep forgetting.