backwash vs slipstream

backwash and slipstream both are nouns.

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

As nouns, backwash and slipstream are synonyms defined as:

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

Other synonyms of backwash include airstream, race, wash.

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