matzo ball vs matzah ball

matzo ball and matzah ball both are nouns.

Word	Noun	Adjective	Verb	Adverb
matzo ball	Yes	No	No	No
matzah ball	Yes	No	No	No

As nouns, matzo ball and matzah ball are synonyms defined as:

matzo ball and matzah ball: a Jewish dumpling made of matzo meal; usually served in soup

Other synonyms of matzo ball include matzoh ball.

matzo ball (noun)	matzah ball (noun)
a Jewish dumpling made of matzo meal; usually served in soup	a Jewish dumpling made of matzo meal; usually served in soup