Pied Piper of Hamelin vs Pied Piper

Pied Piper of Hamelin and Pied Piper both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pied Piper of Hamelin	Yes	No	No	No
Pied Piper	Yes	No	No	No

As nouns, Pied Piper of Hamelin and Pied Piper are synonyms defined as:

Pied Piper of Hamelin and Pied Piper: the title character in a German folk tale and in a poem by Robert Browning

Pied Piper of Hamelin (noun)	Pied Piper (noun)
the title character in a German folk tale and in a poem by Robert Browning	the title character in a German folk tale and in a poem by Robert Browning