The word unventilated 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™ Plays In The Letters unventilated
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Seven Letter Word Alert: (41 words)
adenine, annelid, annulet, anviled, attuned, auditee, deltate, dentate, dentine, detinue, devalue, deviant, deviate, diluent, elative, eluated, enliven, entitle, evident, evitate, lenient, lenited, lineate, livened, lunated, nettled, tainted, taunted, undealt, uneaten, unideal, unladen, unlined, untiled, unvaned, valeted, vaulted, vaunted, veinlet, veinule, vinelet