parking zone vs parking space

parking zone and parking space both are nouns.

Word	Noun	Adjective	Verb	Adverb
parking zone	Yes	No	No	No
parking space	Yes	No	No	No

As nouns, parking zone and parking space are synonyms defined as:

parking zone and parking space: a space where an automobile can be parked

parking zone (noun)	parking space (noun)
a space where an automobile can be parked	a space where an automobile can be parked