washout vs dud

washout and dud both are nouns.

Word	Noun	Adjective	Verb	Adverb
washout	Yes	No	No	No
dud	Yes	Yes	No	No

As nouns, washout and dud are synonyms defined as:

Other synonyms of washout include flop.

washout (noun)	dud (noun)
someone who is unsuccessful	an event that fails badly or is totally ineffectual
the erosive process of washing away soil or gravel by water (as from a roadway)	an explosion that fails to occur
the channel or break produced by erosion of relatively soft soil by water	someone who is unsuccessful

washout (adjective)	dud (adjective)
	failing to detonate; especially not charged with an active explosive