arch-enemy /ärch-enˈə-mi/

1. A chief enemy
2. Satan (also arch-felˈon, arch-fiendˈ, arch-foeˈ)

• rock-steady
• rocksteady
• rock tar
• rock temple
• rock temples
• rock the boat
• rock tripe
• rock tripes
• rock turbot
• rockumentary
• rock up
• rock violet
• rock violets
• rockwater
• rockwaters
• rockweed
• rockweeds
• rock wood
• rock wool
• rock wools
• rockwork
• rockworks
• rocky
• Rocky Mountain goat
• rococo