Armstrong vs Neil Armstrong

Armstrong and Neil Armstrong both are nouns.

Word	Noun	Adjective	Verb	Adverb
Armstrong	Yes	No	No	No
Neil Armstrong	Yes	No	No	No

As nouns, Armstrong and Neil Armstrong are synonyms defined as:

Armstrong and Neil Armstrong: United States astronaut; the first man to set foot on the Moon (July 20, 1969) (1930-)

Armstrong (noun)	Neil Armstrong (noun)
United States pioneering jazz trumpeter and bandleader (1900-1971)	United States astronaut; the first man to set foot on the Moon (July 20, 1969) (1930-)
United States astronaut; the first man to set foot on the Moon (July 20, 1969) (1930-)