The word teaspoonfuls 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: 21
Highest Scoring Words With Friends™ Plays In The Letters teaspoonfuls
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Seven Letter Word Alert: (63 words)
apostle, aptness, eluants, ensouls, falsest, fanouts, fastens, fatness, festoon, flaunts, fluents, folates, foulest, fusspot, leantos, leptons, loosens, loosest, lotuses, lunates, napless, nepotal, ooplast, opulent, osteons, outleap, outplan, outsole, outspan, panfuls, passout, pastels, peanuts, penults, planets, platoon, plutons, potfuls, pulsate, punless, saloons, salutes, sensual, softens, solutes, soonest, spousal, stanols, staples, stepson, sulfate, sulfone, sultans, sunspot, taluses, topless, tousles, unloose, unseals, unseats, unspoof, unstops, upslant