smart card vs revolving credit

smart card and revolving credit both are nouns.

Word	Noun	Adjective	Verb	Adverb
smart card	Yes	No	No	No
revolving credit	Yes	No	No	No

As nouns, revolving credit is a hypernym of smart card; that is, revolving credit is a word with a broader meaning than smart card:

smart card: a plastic card containing a microprocessor that enables the holder to perform operations requiring data that is stored in the microprocessor; typically used to perform financial transactions
revolving credit: a consumer credit line that can be used up to a certain limit or paid down at any time

Other hypernyms of smart card include positive identification, charge account credit, open-end credit.

smart card (noun)	revolving credit (noun)
a plastic card containing a microprocessor that enables the holder to perform operations requiring data that is stored in the microprocessor; typically used to perform financial transactions	a consumer credit line that can be used up to a certain limit or paid down at any time