G4431–πτῶσις–ptōsis

And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell: and great was the fall of it.

πτῶσις ptōsis “fall”

And Simeon blessed them, and said unto Mary his mother, Behold, this child is set for the fall and rising again of many in Israel; and for a sign which shall be spoken against;

πτῶσιν ptōsin “[the] falling”