1. Repeating the same thing in different words; tautological

Encyclopedia: Tautologous

• Potsdam
• Potsdam Conference
• potsherd
• potshot
• potstone
• Pott's disease
• pottage
• potted
• potter
• potter around
• potter bee
• potter wasp
• potter's clay
• potter's earth
• potter's field
• potter's wheel
• potterer
• pottery
• pottle
• potto
• pottu
• potty
• potty chair
• potty seat
• potty-trained