The word imprudently 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: 23
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (34 words)
diluent, diluter, drumlin, dumpier, emptily, imputed, ineptly, inertly, intrude, lumpier, minuter, munited, mutedly, plumier, plunder, printed, prudent, reinput, rumpled, runtime, tendril, tepidly, tindery, tiredly, tripled, trumped, trundle, umpired, untiled, untimed, untired, untried, untyped, uptrend