catacoustics /ka-tə-kooˈstiks or (esp formerly) -kowˈstiks/

The area of the science of acoustics that deals with echoes or reflected sounds

• poplinette
• poplinettes
• poplins
• popliteal
• poplitic
• pop music
• pop off
• pop one's clogs
• popover
• popovers
• poppa
• poppadum
• poppadums
• poppas
• popped
• popper
• Popperian
• poppering
• poppering pear
• popperings
• poppers
• poppet
• poppet-head
• poppet-heads
• poppets