Ologies

How many of these ologies are you acquainted with? Some of them are easy, some of them I have no idea about. Also, which one is the odd one out?

Helioseismology.
Agnoiology.
Molinology.
Anesthesiology.
Areology.
Balneology.
Campanology?.
Cereology.
Musicology.
Apology.