The word miniaturists 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: 17
Highest Scoring Words With Friends™ Plays In The Letters miniaturists
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Seven Letter Word Alert: (30 words)
animist, artists, atriums, autists, instars, intrust, intuits, martini, martins, missuit, misturn, mutants, raisins, simians, statins, statism, strains, straint, straits, stratum, stratus, sunstar, sustain, tantrum, transit, tritium, truants, tsarism, tsarist, tsunami