“Demon” being in with the “joker” category. Since “card” is not a term I’ve ever heard used that way.

“Chess” being in with the bars. I had to Google around and didn’t notice the missing “s” from Snicker, Airhead, and Mound. (Snicker was the only one I’d heard of confidently, and I had a vague sense that Airhead would be correct already.)

Snicker and laugh as the verbal forms. Never found a third.

Mound and bump being together. Thought “mar” might somehow fit in there too.