charge card vs revolving credit

charge card and revolving credit both are nouns.

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

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

charge card: a card (usually plastic) that assures a seller that the person using it has sufficient means of payment and that the issuer will see to it that the seller receives payment for the merchandise delivered
revolving credit: a consumer credit line that can be used up to a certain limit or paid down at any time

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

charge card (noun)	revolving credit (noun)
a card (usually plastic) that assures a seller that the person using it has sufficient means of payment and that the issuer will see to it that the seller receives payment for the merchandise delivered	a consumer credit line that can be used up to a certain limit or paid down at any time