dead-end street vs blind alley

dead-end street and blind alley both are nouns.

Word	Noun	Adjective	Verb	Adverb
dead-end street	Yes	No	No	No
blind alley	Yes	No	No	No

As nouns, dead-end street and blind alley are synonyms defined as:

Other synonyms of dead-end street include cul de sac, impasse.

dead-end street (noun)	blind alley (noun)
a street with only one way in or out	(figurative) a course of action that is unproductive and offers no hope of improvement
	a street with only one way in or out