cacodemon or cacodaemon /kak-ō-dēˈmən/

1. An evil spirit or devil
2. A nightmare (Shakespeare)

• rivermen
• river mouth
• river mouths
• river mussel
• river mussels
• river novel
• river-rat
• river-rats
• rivers
• river sand
• riverscape
• riverscapes
• riverside
• riversides
• river-terrace
• river-terraces
• river-tide
• river-tides
• riverwalk
• riverwalks
• river wall
• river walls
• river water
• riverway
• riverways