The word intermural 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: 16
Highest Scoring Words With Friends™ Play In The Letters intermural
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Seven Letter Word Alert: (37 words)
ailment, aliment, arenium, emulant, erratum, latrine, maltier, manlier, manurer, mariner, marlite, maturer, minaret, mineral, minuter, muriate, netmail, neutral, numeral, nutmeal, raiment, ratline, reliant, retinal, retrain, retrial, ruminal, runtier, runtime, terrain, trailer, trainer, trenail, unalert, unalter, uralite, urinate