The word conventionality 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: 28
Highest Scoring Words With Friends™ Play In The Letters conventionality
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Seven Letter Word Alert: (67 words)
acolyte, aconite, acyloin, aloetic, ancient, aniline, anionic, antlion, avionic, cannily, cannoli, cannolo, catenin, cattily, ciliate, coalite, connive, connote, contain, content, convent, coolant, cottony, cotylae, cyanine, cyanite, elation, ilvaite, inanely, incline, inocyte, invoice, lactone, latency, lattice, lection, naively, naivety, nattily, nictate, nonclay, noncola, nonevil, nonlate, nonlove, nonoily, novelty, olivine, oolitic, otolite, ovately, ovation, ovinely, ovocyte, tacitly, tactile, tenancy, tetanic, tinnily, titanic, toenail, valency, violate, violent, vitiate, volcano, voltaic