Saint Kitts and Nevis vs St. Kitts and Nevis

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

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

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

Saint Kitts and Nevis and St. Kitts and 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. Christopher-Nevis.

Saint Kitts and Nevis (noun)	St. Kitts and 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