The word collateralized 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: 30
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (87 words)
acerate, aerated, aircell, airdate, alditol, alerted, allelic, aloetic, altered, areolae, article, caldera, calorie, carload, caroled, carotid, catered, cedilla, citadel, cleared, clodlet, coalier, coalite, coalize, coaltar, codilla, codille, collard, collate, collide, collier, cordate, cordial, coterie, cotidal, created, dealate, declare, decrial, delator, deltaic, dialect, dialler, diazole, dilater, dilator, elector, erotica, erotize, etaerio, lacteal, lateral, leotard, literal, located, ocellar, oldlace, oracled, radiate, radical, radicel, radicle, rallied, reacted, realize, reallot, recital, recited, redealt, relaced, related, reoiled, retiled, tallied, tallier, tiaraed, trailed, treacle, treadle, trilled, trolled, zelator, zeolite, zoarial, zoecial, zorilla, zorille