street vs Harley Street

street and Harley Street both are nouns.

Word	Noun	Adjective	Verb	Adverb
street	Yes	No	No	No
Harley Street	Yes	No	No	No

street (noun)	Harley Street (noun)
a thoroughfare (usually including sidewalks) that is lined with buildings	a street in central London where the consulting rooms of many physicians and surgeons are located
the part of a thoroughfare between the sidewalks; the part of the thoroughfare on which vehicles travel
people living or working on the same street
the streets of a city viewed as a depressed environment in which there is poverty and crime and prostitution and dereliction
a situation offering opportunities