The word outmarching 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™ Plays In The Letters outmarching
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Seven Letter Word Alert: (36 words)
arching, auction, carting, caution, chagrin, chariot, choragi, choring, chroman, coating, cranium, crating, curtain, haircut, hangout, haricot, harming, hurting, marconi, migrant, moating, monarch, oghamic, orating, organic, outgain, outgrin, rainout, roaming, routing, thorium, touring, tracing, unchair, uncharm, unmatch