The word speedometers 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 speedometers
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Seven Letter Word Alert: (50 words)
deepest, demotes, deports, deposer, deposes, depress, deserts, despots, dessert, emersed, emerses, emoters, empress, esteems, meeters, meteors, metered, pesters, petered, poetess, posters, premeet, presets, pressed, redeems, reested, remeets, remotes, reposed, reposes, reposts, reseeds, respots, restems, resteps, seeders, speeder, sported, steeped, steeper, steered, stereos, stomped, stomper, stormed, teemers, teepees, tempers, tempore, tressed