meal vs matzo meal

meal and matzo meal both are nouns.

Word	Noun	Adjective	Verb	Adverb
meal	Yes	No	No	No
matzo meal	Yes	No	No	No

As nouns, matzo meal is a hyponym of meal; that is, matzo meal is a word with a more specific, narrower meaning than meal:

meal: coarsely ground foodstuff; especially seeds of various cereal grasses or pulse
matzo meal: meal made from ground matzos

meal (noun)	matzo meal (noun)
the food served and eaten at one time	meal made from ground matzos
coarsely ground foodstuff; especially seeds of various cereal grasses or pulse
any of the occasions for eating food that occur by custom or habit at more or less fixed times