Katharine Houghton Hepburn vs Hepburn

Katharine Houghton Hepburn and Hepburn both are nouns.

Word	Noun	Adjective	Verb	Adverb
Katharine Houghton Hepburn	Yes	No	No	No
Hepburn	Yes	No	No	No

As nouns, Katharine Houghton Hepburn and Hepburn are synonyms defined as:

Katharine Houghton Hepburn and Hepburn: United States film actress who appeared in many films with Spencer Tracy (1907-2003)

Other synonyms of Katharine Houghton Hepburn include Audrey Hepburn, Katharine Hepburn.

Katharine Houghton Hepburn (noun)	Hepburn (noun)
United States film actress who appeared in many films with Spencer Tracy (1907-2003)	United States film actress who appeared in many films with Spencer Tracy (1907-2003)