city planning vs urban planning

city planning and urban planning both are nouns.

Word	Noun	Adjective	Verb	Adverb
city planning	Yes	No	No	No
urban planning	Yes	No	No	No

As nouns, city planning and urban planning are synonyms defined as:

city planning and urban planning: determining and drawing up plans for the future physical arrangement and condition of a community

Other synonyms of city planning include town planning.

city planning (noun)	urban planning (noun)
determining and drawing up plans for the future physical arrangement and condition of a community	determining and drawing up plans for the future physical arrangement and condition of a community
	the branch of architecture dealing with the design and organization of urban space and activities