Do you know ghouls from goblins and ghosts?
c.1300, "one who delivers or rescues from peril," also a title of Jesus Christ, from Old French sauveour, from Late Latin salvatorem (nominative salvator) "a saver, preserver" (cf. Spanish salvador, Italian salvatore), from salvatus, past participle of salvare "to save" (see save (v.)). In Christian sense, a translation of Greek soter "savior." Replaced Old English hælend, literally "healing," noun use of present participle of hælan (see heal).