Internal monologue is a like a war correspondent's report of the daily battle. The journalist didn't plan or fight the battle, they just provided an after-the-fact description. Likewise the brain's thinking--a highly parallelized process involving billions of neurons--is not done with words.

Play a little game of "what word will I think of next?" ... just let it happen. Those word choices are fed to the monologue, they aren't a product of it.

Hmm, yes, but, and it is not a small but, do people -- including full blown internal monologue people - think thoughts akin to:

move.panic.fear.run

that effectively becomes one thought and not a word exactly. I am stating it like this, because I worry that my initial point may have been lost.

edit: I can only really speak for myself, but I am curious how people might respond to the distinction.