poltergeist /pōlˈ or polˈtər-gīst/

1. A mysterious invisible force asserted to throw or move things about
2. A noisy ghost

• flatbed lorry
• flatbeds
• flatbed scanner
• flatbed scanners
• flatbed truck
• flatbed trucks
• flatboat
• flatboats
• flatbread
• flatbreads
• flat broke
• flat cap
• flat caps
• flatcar
• flatcars
• flat-chested
• flat-earther
• flat-earthers
• flat file
• flat files
• flatfish
• flatfishes
• flat-foot
• flat-footed
• flat-footedness