Kingston upon Hull vs Kingston-upon Hull

Kingston upon Hull and Kingston-upon Hull both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kingston upon Hull	Yes	No	No	No
Kingston-upon Hull	Yes	No	No	No

As nouns, Kingston upon Hull and Kingston-upon Hull are synonyms defined as:

Kingston upon Hull and Kingston-upon Hull: a large fishing port in northeastern England

Other synonyms of Kingston upon Hull include Hull.

Kingston upon Hull (noun)	Kingston-upon Hull (noun)
a large fishing port in northeastern England	a large fishing port in northeastern England