Inundation
Part of speech: noun
Definition: The act of inundating, or the state of being inundated; an overflow; a flood; a rising and spreading of water over grounds. (metaphorical) An overspreading of any kind; overflowing or superfluous abundance; a flood; a great influx; as, an inundation of tourists.
Flooding
Part of speech: verb
Definition: To overflow, as by water from excessive rainfall.
Part of speech: noun
Definition: An act of flooding; a flood or gush.