The word amplifiers 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: 20
Highest Scoring Words With Friends™ Play In The Letters amplifiers
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Seven Letter Word Alert: (29 words)
fairies, felspar, filmier, filmise, flamers, impairs, impaler, impales, imperil, implies, lempira, mailers, misfile, misfire, palmier, pilfers, prelims, primase, prismal, realism, refilms, reflips, remails, sampler, similar, simpler, siriema, slimier, smilier