The word philandering 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: 23
Highest Scoring Words With Friends™ Play In The Letters philandering
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Seven Letter Word Alert: (79 words)
airline, aligned, aligner, anilide, aniline, annelid, dangler, darling, darning, dealign, dealing, deliria, denarii, deraign, dialing, digraph, dingier, draping, earning, eliding, gnarled, grained, graphed, grinned, hagride, hailing, hairpin, handier, handing, handler, harelip, harping, heading, headpin, healing, heaping, hearing, helipad, helping, heparin, herding, hernial, hindleg, ingrain, inhaled, inhaler, lairing, landing, larding, leading, leaning, leaping, learing, lending, lipread, nailing, nearing, paining, pairing, pealing, pending, pingled, pingler, pinhead, plainer, planing, planned, planner, praline, predial, priding, raiding, railing, raining, reading, realign, reaping, reining, rending