dumpling vs matzah ball

dumpling and matzah ball both are nouns.

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

As nouns, matzah ball is a hyponym of dumpling; that is, matzah ball is a word with a more specific, narrower meaning than dumpling:

Other hyponyms of dumpling include gnocchi, matzo ball, matzoh ball, won ton, wonton.

dumpling (noun)	matzah ball (noun)
small balls or strips of boiled or steamed dough	a Jewish dumpling made of matzo meal; usually served in soup
dessert made by baking fruit wrapped in pastry