numskull or numbskull /numˈskul/ (informal)

A blockhead

numˈskulled adjective

• water snail
• water snails
• water snake
• water snakes
• waters of crystallization
• water softener
• water softeners
• water soldier
• water soldiers
• water-soluble
• water souchy
• water spaniel
• water spaniels
• water spider
• water spiders
• water spirit
• water spirits
• water splash
• water splashes
• water sports
• waterspout
• waterspouts
• water spring
• water springs
• water-sprinkle