SEVEN-LETTER WORD

My first is in spell, but not in book,

My second in freight and also shook;

My third in cauldron, but not in pot,

My fourth in net and also not.

My fifth is in bat, but not in vampire,

My sixth in coal, but not in fire;

My seventh in moon, but not in night,

My whole is something that might give you a fright.

Answer:

PHANTOM