The word ethnological 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: 22
Highest Scoring Words With Friends™ Play In The Letters ethnological
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Seven Letter Word Alert: (60 words)
aconite, alcogel, alcohol, alethic, aloetic, angelic, anthill, calling, catelog, catogen, celling, cholate, choline, coaling, coalite, coating, cognate, coinage, collage, collate, cologne, colonel, congeal, coolant, cooling, echoing, elating, elation, enlight, etching, ethanol, ethical, galleon, gelatin, genital, halogen, halting, healing, heating, helical, hellcat, hooting, hotline, lactone, lathing, leching, lection, lighten, logical, looting, octagon, ootheca, tagline, tangelo, telling, tillage, toenail, tollage, tolling, tooling