English rule for making nouns plural that end in z?

There's no specific rule for making nouns ending in "z" plural. The rule depends on the pronunciation of the word:

* If the "z" sound is pronounced like a "z", add "-es" to the end:

* *buzz* -> *buzzes*

* *quiz* -> *quizzes*

* *fiz* -> *fizzes*

* If the "z" sound is pronounced like a "s", simply add "-s":

* *blitz* -> *blitzes*

* *chutzpah* -> *chutzpahs*

* *fez* -> *fezes*

Important Note: The pronunciation of the "z" can be tricky, especially in words borrowed from other languages. It's helpful to consult a dictionary to confirm the correct plural form.