The word nonvolatilizable cannot be made in Words With Friends™. It is 16 letters long, too long to fit on a WordsWithFriends board (15 letters max).
Highest Scoring Words With Friends™ Play In The Letters nonvolatilizable
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Seven Letter Word Alert: (53 words)
abalone, aeolian, alanine, albinal, albizia, alveola, alveoli, aniline, antlion, balloon, benzoin, biennia, billion, biolite, biozone, blintze, bolivia, bonanza, boolean, elation, ilvaite, labiate, lanolin, lionize, livable, lobelia, lovable, nanobot, netball, niobate, niobite, nonevil, nonlate, nonlove, notable, novella, obovate, obviate, olivine, ovation, ozonate, tabooli, tobiano, toenail, valiant, vanilla, villain, violate, violent, vitelli, zealant, zillion, zoolite