tinned goods vs foodstuff

tinned goods and foodstuff both are nouns.

Word	Noun	Adjective	Verb	Adverb
tinned goods	Yes	No	No	No
foodstuff	Yes	No	No	No

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

Other hypernyms of tinned goods include food product.

tinned goods (noun)	foodstuff (noun)
food preserved by canning	(usually plural) consumer goods sold by a grocer
	a substance that can be used or prepared for use as food