The word palindrome 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™ Plays In The Letters
Seven Letter Word Alert: (39 words)
aileron, almoner, amidone, aneroid, diploma, dipolar, earldom, earmold, impaled, impaler, impanel, implode, implore, lamnoid, lempira, leopard, lipread, loamier, mandrel, mandril, manlier, mineral, moldier, moraine, opaline, operand, ordinal, palmier, paroled, plainer, praline, predial, preload, premold, proline, repoman, roadmen, romaine, ropeman