O. Henry vs Porter

O. Henry and Porter both are nouns.

Word	Noun	Adjective	Verb	Adverb
O. Henry	Yes	No	No	No
Porter	Yes	No	No	No

As nouns, O. Henry and Porter are synonyms defined as:

O. Henry and Porter: United States writer of short stories whose pen name was O. Henry (1862-1910)

Other synonyms of O. Henry include William Sydney Porter.

O. Henry (noun)	Porter (noun)
United States writer of short stories whose pen name was O. Henry (1862-1910)	United States writer of short stories whose pen name was O. Henry (1862-1910)
	United States composer and lyricist of musical comedies (1891-1946)
	United States writer of novels and short stories (1890-1980)