The word outmarched 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: 20
Highest Scoring Words With Friends™ Plays In The Letters outmarched
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Seven Letter Word Alert: (30 words)
cathode, charmed, charted, chromed, comrade, cordate, courted, curated, decaohm, decorum, eductor, humored, marched, matched, matcher, matured, mouthed, octamer, outdare, outrace, outread, readout, rematch, retouch, roached, temurah, torched, touched, toucher, traduce