1. Moving very rapidly to and fro or up and down

See also: moving, vibrate

• show trial
• show up
• show window
• show-and-tell
• show-off
• showbiz
• showboat
• showbread
• showcase
• showdown
• shower
• shower bath
• shower cap
• shower curtain
• shower down
• shower room
• shower stall
• showerhead
• showerproof
• showery
• showgirl
• showily
• showiness
• showing
• showjumper