doppelgänger

An apparition or double of a living person; someone who looks strikingly similar to another.

• (no common derivatives)

• evil doppelgänger
• celebrity doppelgänger
• find one's doppelgänger
• uncanny doppelgänger

1. 1.She spotted her doppelgänger on the subway — a complete stranger who could have been her twin. (lookalike)
2. 2.In Gothic literature, encountering one's doppelgänger was considered an omen of death. (ghostly double)

• double/ˈdʌbəl/— someone who looks identical
• lookalike/ˈlʊkəlaɪk/— someone resembling another
• twin/twɪn/— one who closely resembles another

from German "Doppelgänger" — doppel (double) + Gänger (goer/walker) — a double who walks alongside you