The word denaturalize 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: 25
Highest Scoring Words With Friends™ Plays In The Letters denaturalize
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Seven Letter Word Alert: (81 words)
adrenal, adulate, aerated, airdate, alerted, altered, arenite, auditee, azulene, azurine, azurite, dealate, denture, detinue, detrain, detuner, diazane, diazene, dilater, diluent, diluter, diurnal, dualize, eluated, enteral, erudite, eternal, intrude, latrine, launder, learned, lenited, lineate, lunaria, lunated, natural, natured, neutral, radiant, radiate, radulae, ratline, realize, reaudit, redealt, redline, related, reliant, relined, retiled, retinal, retuned, reunite, tendril, tenured, tiaraed, tradein, trailed, trained, trainee, treadle, trenail, triaene, trundle, tzarina, unaired, unalert, unalter, undealt, unideal, unrated, untiled, untired, untread, untried, uralite, urazine, urinate, uterine, zealant, zenaida