φόβητρον G5400
phóbētron · fob'-ay-tron · Noun Neuter
neuter of a derivative of φοβέω; a frightening thing, i.e. terrific portent:--fearful sight.
1 Occurrence in the King James Bible
Luke 21:11And great earthquakes shall be in divers places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven.