The word soldiership 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: 18
Highest Scoring Words With Friends™ Play In The Letters soldiership
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Seven Letter Word Alert: (37 words)
delphis, despoil, dipoles, dispels, dispose, doilies, dossier, hissier, holders, hosiers, idolise, iodiser, iodises, isohels, liriope, lispers, lossier, periods, pisoids, pissier, presold, reships, resoils, rodless, rosehip, shields, sidlers, sliders, slopers, sloshed, solders, soldier, soliped, spiders, spiroid, spoiled, spoiler