slipstream vs backwash

slipstream and backwash both are nouns.

Word	Noun	Adjective	Verb	Adverb
slipstream	Yes	No	No	No
backwash	Yes	No	No	No

As nouns, slipstream and backwash are synonyms defined as:

slipstream and backwash: the flow of air that is driven backwards by an aircraft propeller

Other synonyms of slipstream include airstream, race, wash.

slipstream (noun)	backwash (noun)
the flow of air that is driven backwards by an aircraft propeller	the wave that spreads behind a boat as it moves forward
	the flow of air that is driven backwards by an aircraft propeller
	the consequences of an event (especially a catastrophic event)