ration card vs identity card

ration card and identity card both are nouns.

Word	Noun	Adjective	Verb	Adverb
ration card	Yes	No	No	No
identity card	Yes	No	No	No

As nouns, identity card is a hypernym of ration card; that is, identity card is a word with a broader meaning than ration card:

ration card: a card certifying the bearer's right to purchase rationed goods
identity card: a card certifying the identity of the bearer

Other hypernyms of ration card include card.

ration card (noun)	identity card (noun)
a card certifying the bearer's right to purchase rationed goods	a card certifying the identity of the bearer