washout vs wash out

washout is a noun but wash out is not a noun.

Word	Noun	Adjective	Verb	Adverb
washout	Yes	No	No	No
wash out	No	No	Yes	No

washout (noun)	wash out (noun)
someone who is unsuccessful
the erosive process of washing away soil or gravel by water (as from a roadway)
the channel or break produced by erosion of relatively soft soil by water

washout (verb)	wash out (verb)
	deplete of strength or vitality
	lose color in the process of being washed
	drain off the color in the course of laundering
	remove by the application of water or other liquid and soap or some other cleaning agent
	wear or destroy by the force of water
	wash free from unwanted substances, such as dirt
	prevent or interrupt due to rain