Foster vs Stephen Foster

Foster and Stephen Foster both are nouns.

Word	Noun	Adjective	Verb	Adverb
Foster	Yes	No	No	No
Stephen Foster	Yes	No	No	No

As nouns, Foster and Stephen Foster are synonyms defined as:

Foster and Stephen Foster: United States songwriter whose songs embody the sentiment of the South before the American Civil War (1826-1864)

Other synonyms of Foster include Stephen Collins Foster.

Foster (noun)	Stephen Foster (noun)
United States songwriter whose songs embody the sentiment of the South before the American Civil War (1826-1864)	United States songwriter whose songs embody the sentiment of the South before the American Civil War (1826-1864)