The word hovercrafts 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 hovercrafts
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Seven Letter Word Alert: (54 words)
archers, archfoe, carrots, carters, carvers, cavorts, chafers, charter, chaster, coarser, coaster, coverts, crafter, crasher, craters, cravers, creator, crofter, earshot, factors, farther, fathers, forcers, fraters, froster, frother, hafters, harvest, hoarser, octaves, overact, oversat, rafters, reactor, rechart, recoats, recraft, rectors, refavor, refract, reroast, rhetors, roaches, roaster, savorer, serovar, shorter, starver, torches, tracers, trasher, trocars, trochar, vectors