arch-enemy /ärch-enˈə-mi/

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

• hepatotoxic
• hep-cat
• hep-cats
• hepherd's weather glass
• hephthemimer
• hephthemimeral
• hephthemimers
• hepper
• heppest
• Hepplewhite
• heps
• hepster
• hept
• hepta-
• heptachlor
• heptachlor epoxide
• heptachlors
• heptachord
• heptachords
• heptad
• heptads
• heptagon
• heptagonal
• heptagons
• Heptagynia