Cherbourg vs Cherbourg-Octeville

Cherbourg and Cherbourg-Octeville both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cherbourg	Yes	No	No	No
Cherbourg-Octeville	Yes	No	No	No

As nouns, Cherbourg and Cherbourg-Octeville are synonyms defined as:

Cherbourg and Cherbourg-Octeville: a port town in northwestern France on the English Channel; site of a naval base

Cherbourg (noun)	Cherbourg-Octeville (noun)
a port town in northwestern France on the English Channel; site of a naval base	a port town in northwestern France on the English Channel; site of a naval base