Incubus

Noun

 * 1) An evil spirit supposed to oppress people while asleep, especially to have sex with women as they sleep.
 * 2) A feeling of oppression during sleep; night terrors, a nightmare.
 * 3) Any oppressive thing or person; a burden.
 * 4) One of a genus of parasitic insects.

Synonyms

 * nightmare

Hypernyms

 * evil spirit, spirit

Thesaurus
Baba Yaga, Dracula, Frankenstein, Lilith, Wolf-man, afreet, bad dream, bale, barghest, bogey, bogeyman, brown study, bugaboo, bugbear, burden, burdening, burthen, cacodemon, cargo, charge, charging, cumber, cumbrance, daeva, daydream, deadweight, demon, devil, drag, dream, dybbuk, evil spirit, fee-faw-fum, fiend, fiend from hell, freight, frightener, genie, genius, ghost, ghoul, gyre, handicap, hellion, hobgoblin, holy terror, horror, incumbency, jinni, jinniyeh, lading, lamia, load, loading, millstone, monster, nightmare, ogre, ogress, oppression, overload, overtaxing, overweighting, phantom, pipe dream, pressure, rakshasa, revenant, reverie, saddling, satan, scarebabe, scarecrow, scarer, shedu, specter, succubus, superincumbency, surcharge, taxing, terror, the undead, vampire, vision, werewolf, yogini