Saint Kitts and Nevis vs St. Christopher-Nevis

Saint Kitts and Nevis and St. Christopher-Nevis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Saint Kitts and Nevis	Yes	No	No	No
St. Christopher-Nevis	Yes	No	No	No

As nouns, Saint Kitts and Nevis and St. Christopher-Nevis are synonyms defined as:

Saint Kitts and Nevis and St. Christopher-Nevis: a country on several of the Leeward Islands; located to the east southeast of Puerto Rico; achieved independence from the United Kingdom in 1983

Other synonyms of Saint Kitts and Nevis include Federation of Saint Kitts and Nevis, Saint Christopher-Nevis, St. Kitts and Nevis.

Saint Kitts and Nevis (noun)	St. Christopher-Nevis (noun)
a country on several of the Leeward Islands; located to the east southeast of Puerto Rico; achieved independence from the United Kingdom in 1983	a country on several of the Leeward Islands; located to the east southeast of Puerto Rico; achieved independence from the United Kingdom in 1983