The word arboriculturist 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: 24
Highest Scoring Words With Friends™ Play In The Letters arboriculturist
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Seven Letter Word Alert: (69 words)
abiotic, abortus, aboulic, albitic, altoist, arbours, arbutus, auscult, autobus, bailout, biotics, biscuit, blastic, bristol, burials, burrito, caribou, carrots, citator, cobalts, colitis, corrals, corsair, crustal, cuatros, cultist, curator, curials, curious, curtail, cutouts, italics, labours, libator, oculars, oculist, orbital, oscular, outbats, outcast, outlast, outsail, raucous, ricotta, rituals, rosalic, rostral, rubouts, rubrics, satiric, scribal, scrotal, solicit, starlit, stoical, strobic, subcult, subrail, sutural, tailors, titular, tourist, tractor, traitor, tribals, tricots, trocars, tubular, turbots