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

• sumptuosity
• sumptuous
• sumptuously
• sumptuousness
• sumptuousnesses
• sums
• sum total
• sum totals
• sumy
• sun
• Sun.
• sun-and-planet
• sun animalcule
• sunbake
• sunbaked
• sunbakes
• sunbaking
• sunbath
• sunbathe
• sunbathed
• sunbather
• sunbathers
• sunbathes
• sunbathing
• sunbathings