numskull or numbskull /numˈskul/ (informal)

A blockhead

numˈskulled adjective

• pennies
• pennies from heaven
• penniform
• penniless
• pennilessness
• pennilessnesses
• pennill
• pennine
• pennines
• penning
• penninite
• Pennisetum
• pennon
• pennoncel
• pennoncelle
• pennoncelles
• pennoncels
• pennoned
• pennons
• penn'orth
• Pennsylvania Dutch
• penny
• penny-a-line
• penny-a-liner
• penny-a-linerism