Stevens vs S. Smith Stevens

Stevens and S. Smith Stevens both are nouns.

Word	Noun	Adjective	Verb	Adverb
Stevens	Yes	No	No	No
S. Smith Stevens	Yes	No	No	No

As nouns, Stevens and S. Smith Stevens are synonyms defined as:

Stevens and S. Smith Stevens: United States psychologist and psychophysicist who proposed Stevens' power law to replace Fechner's law (1906-1973)

Other synonyms of Stevens include Smitty Stevens, Stanley Smith Stevens.

Stevens (noun)	S. Smith Stevens (noun)
United States filmmaker (1905-1975)	United States psychologist and psychophysicist who proposed Stevens' power law to replace Fechner's law (1906-1973)
United States poet (1879-1955)
United States psychologist and psychophysicist who proposed Stevens' power law to replace Fechner's law (1906-1973)