Datacard rhymes with:
telecard, bankcard, flashcard, mastercard, moneycard, postcard, safecard, scorecard, smartcard, telecard, wildcard
Datacard sounds like:
daugherty, decherd, dechert, deckard, deckert, decorate, decorated, decorte, decreed, decried, degrade, degraded, degreed, degroat, degroot, degroote, deichert, desecrate, desecrated, deseret, desert, deserted, desired, dessert, dickard, dickered, dickert, dioguardi, disagreed, discard, discarded, discord, discredit, discredited, discreet, discrete, djakarta, docherty, dockyard, dodsworth, dogeared, dougherty, ducksworth, duckworth, dukart, dygert, dysart, dysert