pizza parlor vs pizzeria

pizza parlor and pizzeria both are nouns.

Word	Noun	Adjective	Verb	Adverb
pizza parlor	Yes	No	No	No
pizzeria	Yes	No	No	No

As nouns, pizza parlor and pizzeria are synonyms defined as:

Other synonyms of pizza parlor include pizza shop.

pizza parlor (noun)	pizzeria (noun)
a shop where pizzas are made and sold	a shop where pizzas are made and sold