spectre

[1]	apparition , ghost , phantom , phantom , phantasm , wraith , apparition , phantasma , fantasm , vision , spirit , specter , shade , revenant , Doppelg├ñnger , chimera , (Colloq) spook , bogeyman/bogyman
[2]	image , ghost , shade , vision , (mental) picture , spook , wraith , specter