DOPPELGANGER
doppelganger
(noun) a ghostly double of a living person that haunts its living counterpart
Source: WordNet® 3.1
Etymology
Noun
doppelganger (plural doppelgangers)
A ghostly double of a living person, especially one that haunts such a person.
An evil twin.
A remarkably similar double; a lookalike.
(fantasy) A monster that takes the forms of people, usually after killing them.
Synonyms
• alter ego
• doubleganger
• evil twin
• lookalike
• double
Source: Wiktionary
Dop"pel*gäng`er, n. [G.]
Definition: A spiritual or ghostly double or counterpart; esp., an
apparitional double of a living person; a cowalker.
Source: Webster’s Unabridged Dictionary 1913 Edition