φάντασμα G5326
phántasma · fan'-tas-mah · Noun Neuter
from φαντάζω; (properly concrete) a (mere) show ("phantasm"), i.e. spectre:--spirit.
2 Occurrences in the King James Bible
Matthew 14:26And when the disciples saw him walking on the sea, they were troubled, saying, It is a spirit; and they cried out for fear.
Mark 6:49But when they saw him walking upon the sea, they supposed it had been a spirit, and cried out: