The word crenulated 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: 17
Highest Scoring Words With Friends™ Play In The Letters crenulated
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Seven Letter Word Alert: (57 words)
alerted, altered, candler, cantred, catered, centaur, central, centred, cleaned, cleaner, cleared, created, cuneate, curated, declare, denture, detuner, educate, eluated, enacted, enteral, eructed, eternal, launder, learned, lectern, lecture, lunated, natured, neutral, nuclear, reacted, recaned, reclean, redealt, reenact, relaced, related, retuned, tenured, traduce, tranced, treacle, treadle, truncal, trundle, ulcered, unalert, unalter, uncared, unclear, uncrate, undealt, unerect, unlaced, unrated, untread