concoction vs foodstuff

concoction and foodstuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
concoction	Yes	No	No	No
foodstuff	Yes	No	No	No

As nouns, foodstuff is a hypernym of concoction; that is, foodstuff is a word with a broader meaning than concoction:

Other hypernyms of concoction include food product.

concoction (noun)	foodstuff (noun)
the act of creating something (a medicine or drink or soup etc.) by compounding or mixing a variety of components	(usually plural) consumer goods sold by a grocer
the invention of a scheme or story to suit some purpose	a substance that can be used or prepared for use as food
an occurrence of an unusual mixture
any foodstuff made by combining different ingredients