Louis Sullivan vs Louis Henri Sullivan

Louis Sullivan and Louis Henri Sullivan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Louis Sullivan	Yes	No	No	No
Louis Henri Sullivan	Yes	No	No	No

As nouns, Louis Sullivan and Louis Henri Sullivan are synonyms defined as:

Louis Sullivan and Louis Henri Sullivan: United States architect known for his steel framed skyscrapers and for coining the phrase `form follows function' (1856-1924)

Other synonyms of Louis Sullivan include Louis Henry Sullivan, Sullivan.

Louis Sullivan (noun)	Louis Henri Sullivan (noun)
United States architect known for his steel framed skyscrapers and for coining the phrase `form follows function' (1856-1924)	United States architect known for his steel framed skyscrapers and for coining the phrase `form follows function' (1856-1924)