Samuel Langhorne Clemens vs Clemens

Samuel Langhorne Clemens and Clemens both are nouns.

Word	Noun	Adjective	Verb	Adverb
Samuel Langhorne Clemens	Yes	No	No	No
Clemens	Yes	No	No	No

As nouns, Samuel Langhorne Clemens and Clemens are synonyms defined as:

Samuel Langhorne Clemens and Clemens: United States writer and humorist best known for his novels about Tom Sawyer and Huckleberry Finn (1835-1910)

Other synonyms of Samuel Langhorne Clemens include Mark Twain.

Samuel Langhorne Clemens (noun)	Clemens (noun)
United States writer and humorist best known for his novels about Tom Sawyer and Huckleberry Finn (1835-1910)	United States writer and humorist best known for his novels about Tom Sawyer and Huckleberry Finn (1835-1910)