incubus /inˈ or ingˈkū-bəs/

1. A devil supposed to assume a male body and have sexual intercourse with women in their sleep (cf succubus)
2. A nightmare
3. Any oppressive person, thing or influence

• oligarchic
• oligarchical
• oligarchically
• oligarchies
• oligarchs
• oligarchy
• oligist
• oligists
• oligo-
• Oligocene
• Oligochaeta
• oligochaete
• oligochaetes
• oligochrome
• oligoclase
• oligoclases
• oligocythaemia
• oligocythaemias
• oligomer
• oligomerous
• oligomers
• oligonucleotide
• oligopeptide
• oligopolies
• oligopolist