The word intermediary 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: 19
Highest Scoring Words With Friends™ Play In The Letters intermediary
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Seven Letter Word Alert: (84 words)
admirer, airtime, amender, amenity, anytime, arenite, aridity, daytime, deanery, demerit, denarii, dernier, detrain, diamine, dietary, dietine, dimeter, dirtier, drainer, draymen, dreamer, emirate, inditer, inerter, inertia, interim, mariner, married, martini, matinee, meadery, meander, meatier, mediate, merited, midyear, minaret, miniate, mintier, mitered, miterer, nerdier, nitride, raiment, rainier, randier, readier, readmit, reamend, rearmed, redream, reentry, reinter, remated, remined, renamed, retimed, retimer, retired, retrade, retrain, retread, retried, tardier, tarried, tearier, termini, ternary, terrain, terrane, timider, tindery, tireder, tradein, trained, trainee, trainer, treader, triaene, trireme, yardmen, yearend, yearned, yearner