The word outmarches 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™ Plays In The Letters outmarches
:
Seven Letter Word Alert: (39 words)
acerous, authors, carouse, cashout, cauters, chaster, chouser, chromes, coaster, costume, cuatros, curates, earshot, hamster, maestro, marches, matcher, matches, matures, mothers, mucosae, octamer, outrace, recoats, rectums, rematch, retouch, roaches, scouter, scrotum, shouter, smother, stomach, temurah, thermos, torches, toucher, touches, urostea