This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. An inundation or flood.

n. A deposit of sand, gravel, etc. made by oceanic flooding.

n. A deposit of superficial loam, sand, gravel, stones, etc., caused by former action of flowing waters, or the melting of glacial ice.

n. A deluge or an inundation; an overflowing.

n. Coarse detrital material, wherever found: a term introduced into geology in consequence of a general belief in the past occurrence of a universal deluge.

"Connected with the diluvium is the history of ossiferous caverns, of which specimens singly exist at Kirkdale in Yorkshire, Gailenreuth in"

alpine diluvium   

deposit    drift   

affusion    diluvian    alluvion    bellum    alluvium    kaolin    gradus    thronum    conclusa    adunationem