The word industrialists 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: 18
Highest Scoring Words With Friends™ Plays In The Letters industrialists
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Seven Letter Word Alert: (40 words)
artists, aulists, autists, diarist, distant, distils, diurnal, dualist, durians, initial, insists, instars, insular, insults, intrust, intuits, islands, lutists, nudists, raisins, rituals, sadists, starlit, statins, strains, straint, straits, strands, stratus, sultans, sundial, sunstar, sustain, titular, transit, truants, tsarist, tundras, unlists, urinals