Canal Zone vs Panama Canal Zone

Canal Zone and Panama Canal Zone both are nouns.

Word	Noun	Adjective	Verb	Adverb
Canal Zone	Yes	No	No	No
Panama Canal Zone	Yes	No	No	No

As nouns, Canal Zone and Panama Canal Zone are synonyms defined as:

Canal Zone and Panama Canal Zone: a zone consisting of a strip of land across the Isthmus of Panama that contains the Panama Canal

Canal Zone (noun)	Panama Canal Zone (noun)
a zone consisting of a strip of land across the Isthmus of Panama that contains the Panama Canal	a zone consisting of a strip of land across the Isthmus of Panama that contains the Panama Canal