pizza pie vs pizza

pizza pie and pizza both are nouns.

Word	Noun	Adjective	Verb	Adverb
pizza pie	Yes	No	No	No
pizza	Yes	No	No	No

As nouns, pizza pie and pizza are synonyms defined as:

pizza pie and pizza: Italian open pie made of thin bread dough spread with a spiced mixture of e.g. tomato sauce and cheese

pizza pie (noun)	pizza (noun)
Italian open pie made of thin bread dough spread with a spiced mixture of e.g. tomato sauce and cheese	Italian open pie made of thin bread dough spread with a spiced mixture of e.g. tomato sauce and cheese