Grace Kelly vs Kelly

Grace Kelly and Kelly both are nouns.

Word	Noun	Adjective	Verb	Adverb
Grace Kelly	Yes	No	No	No
Kelly	Yes	No	No	No

As nouns, Grace Kelly and Kelly are synonyms defined as:

Grace Kelly and Kelly: United States film actress who retired when she married into the royal family of Monaco (1928-1982)

Other synonyms of Grace Kelly include Grace Patricia Kelly, Princess Grace of Monaco.

Grace Kelly (noun)	Kelly (noun)
United States film actress who retired when she married into the royal family of Monaco (1928-1982)	United States dancer who performed in many musical films (1912-1996)
	United States film actress who retired when she married into the royal family of Monaco (1928-1982)
	United States circus clown (1898-1979)