Caveman spelling bee

I was helping Caveman tonight with his French homework.

He says "Dad, is this how you spell 'possibilities' in French?" : posibilités

I tell him, "You're close, Caveman, but it has two 's'es."

"OK, but that looks weird."

"No, it definitely has two 's'es,  very similar to how it's spelled in English."

"Alright, if you're sure Daddy."

On his paper he writes: posibilitéss