pizzeria vs pizza shop

pizzeria and pizza shop both are nouns.

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

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

Other synonyms of pizzeria include pizza parlor.

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