The word reconfirming 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: 25
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (31 words)
coining, comfier, confine, confirm, conifer, coreign, cornier, corning, cringer, fencing, fermion, firming, firring, forcing, foreign, forming, fringer, frogmen, genomic, grimier, grinner, incomer, inferno, ironing, mincing, morning, nonfire, reicing, reining, rimfire, ringmen