I had a wild, paranoid thought that maybe he was Casanova.

And that's when the other paranoid thought occurred to me.

Her next thought, also paranoid, brought up a different possibility.

Now where had that paranoid thought come from?

He dismissed the paranoid thought that Turcaret might try to poison him, and took another sip.

Just another paranoid thought, but a good one.

The paranoid thought usually consists of someone/something plotting against him/her.

I offered a paranoid thought of my own.

My head was full of paranoid thoughts about the 'coincidence' of seeing him again.

Then the ultimate paranoid thought hit him square in the cerebellum.