food cache vs viands

food cache and viands both are nouns.

Word	Noun	Adjective	Verb	Adverb
food cache	Yes	No	No	No
viands	Yes	No	No	No

As nouns, viands is a hypernym of food cache; that is, viands is a word with a broader meaning than food cache:

Other hypernyms of food cache include commissariat, provender, provisions, victuals.

food cache (noun)	viands (noun)
food in a secure or hidden storage place	a stock or supply of foods