Louis Sullivan vs Louis Henry Sullivan

Louis Sullivan and Louis Henry Sullivan both are nouns.

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

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

Louis Sullivan and Louis Henry 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 Henri Sullivan, Sullivan.

Louis Sullivan (noun)	Louis Henry 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)