The word cardholders is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 19
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (54 words)
adorers, archers, carders, caroled, caroler, charred, cheddar, cholera, chorale, chorals, clashed, clasher, clodder, coalers, coarser, coddler, coddles, corrals, cradled, cradles, crashed, crasher, deodars, escolar, heralds, hoarded, hoarder, hoarser, holders, ladders, larches, larders, loaders, oracled, oracles, orchard, ordeals, reclads, recoals, records, reloads, roached, roaches, rodders, saddler, sarcode, scalded, scarred, scholar, scolded, scolder, shoaled, solaced, solacer