Henry Louis Gehrig vs Lou Gehrig

Henry Louis Gehrig and Lou Gehrig both are nouns.

Word	Noun	Adjective	Verb	Adverb
Henry Louis Gehrig	Yes	No	No	No
Lou Gehrig	Yes	No	No	No

As nouns, Henry Louis Gehrig and Lou Gehrig are synonyms defined as:

Henry Louis Gehrig and Lou Gehrig: baseball player who died of amyotrophic lateral sclerosis (1903-1941)

Other synonyms of Henry Louis Gehrig include Gehrig.

Henry Louis Gehrig (noun)	Lou Gehrig (noun)
baseball player who died of amyotrophic lateral sclerosis (1903-1941)	baseball player who died of amyotrophic lateral sclerosis (1903-1941)