1. Flood, flash flood, deluge, freshet, inundation refer to the overflowing of normally dry areas, often after heavy rains. Flood is usually applied to the overflow of a great body of water, as, for example, a river, although it may refer to any water that overflows an area: a flood along the river; a flood in a basement. A flash flood is one that comes so suddenly that no preparation can be made against it; it is usually destructive, but begins almost at once to subside: a flash flood caused by a downpour. Deluge suggests a great downpouring of water, sometimes with destruction: The rain came down in a deluge. Freshet suggests a small, quick overflow such as that caused by heavy rains: a freshet in an abandoned watercourse. Inundation, a literary word, suggests the covering of a great area of land by water: the inundation of thousands of acres.

Did you mean overfold?