numskull or numbskull/ʹnumskul/ noun

• show one's teeth
• show one's true colours
• showpiece
• showplace
• showroom
• show somebody the door
• show-stopper
• show the door to
• show trial
• show up
• showy
• shoyu
• shrank
• shrapnel
• shred
• shredder
• shrew
• shrewd
• shrewish
• shrewmouse
• shriek
• shrieval
• shrievalty
• shrift
• shrike