The word understaffed 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: 22
Highest Scoring Words With Friends™ Play In The Letters understaffed
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Seven Letter Word Alert: (92 words)
asunder, austere, danders, daunted, deadens, deadest, deafens, deafest, dearest, defeats, defends, defraud, defunds, defused, defuser, denture, denuder, denudes, destaff, destuff, detrend, detrude, detuned, detuner, detunes, drafted, draftee, dresden, earnest, eastern, effused, endears, endured, endures, ensured, euaster, feasted, feature, fenders, funders, funfest, furanes, natured, natures, nearest, neuters, nutseed, reasted, redated, redates, reddens, reddest, refunds, refused, refuted, refutes, restaff, restuff, retuned, retunes, saunter, sauteed, sedated, sedater, snafued, snarfed, snuffed, snuffer, staffed, staffer, standee, stander, sterane, sterned, stuffed, stuffer, sudated, tasered, tenders, tenured, tenures, treaded, trended, tundras, undated, undrest, unfaded, unfreed, unrated, unreset, unsated, untread