matzah vs unleavened bread

matzah and unleavened bread both are nouns.

Word	Noun	Adjective	Verb	Adverb
matzah	Yes	No	No	No
unleavened bread	Yes	No	No	No

As nouns, matzah and unleavened bread are synonyms defined as:

Other synonyms of matzah include matzo, matzoh.

matzah (noun)	unleavened bread (noun)
brittle flat bread eaten at Passover	brittle flat bread eaten at Passover