pipe of peace vs peace pipe

pipe of peace and peace pipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
pipe of peace	Yes	No	No	No
peace pipe	Yes	No	No	No

As nouns, pipe of peace and peace pipe are synonyms defined as:

pipe of peace and peace pipe: a highly decorated ceremonial pipe of Amerindians; smoked on ceremonial occasions (especially as a token of peace)

Other synonyms of pipe of peace include calumet.

pipe of peace (noun)	peace pipe (noun)
a highly decorated ceremonial pipe of Amerindians; smoked on ceremonial occasions (especially as a token of peace)	a highly decorated ceremonial pipe of Amerindians; smoked on ceremonial occasions (especially as a token of peace)