The word intracellular 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: 21
Highest Scoring Words With Friends™ Play In The Letters intracellular
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Seven Letter Word Alert: (61 words)
aclinal, aircell, alicant, allelic, allurer, arcuate, article, auricle, canulae, canular, carinae, carinal, cauline, centaur, central, certain, cranial, cruller, cureall, curlier, currant, current, curtail, curtain, cutline, erratic, lacteal, lacunae, lateral, latrine, literal, lunaria, lunatic, narrate, natural, nautica, neutral, nuclear, railcar, ratline, ratrace, recital, recruit, reincur, reliant, retinal, retrain, retrial, runtier, tallier, terrain, trailer, trainer, trenail, truncal, unalert, unalter, unclear, uncrate, uralite, urinate