town planning vs city planning

town planning and city planning both are nouns.

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

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

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

Other synonyms of town planning include urban planning.

town planning (noun)	city 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