East Saint Louis vs East St. Louis

East Saint Louis and East St. Louis both are nouns.

Word	Noun	Adjective	Verb	Adverb
East Saint Louis	Yes	No	No	No
East St. Louis	Yes	No	No	No

As nouns, East Saint Louis and East St. Louis are synonyms defined as:

East Saint Louis and East St. Louis: a town in southwest Illinois on the Mississippi across from Saint Louis

East Saint Louis (noun)	East St. Louis (noun)
a town in southwest Illinois on the Mississippi across from Saint Louis	a town in southwest Illinois on the Mississippi across from Saint Louis