The word decongestant 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: 20
Highest Scoring Words With Friends™ Plays In The Letters decongestant
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Seven Letter Word Alert: (67 words)
acetone, acnodes, attends, canteen, cantons, catogen, cenotes, cestode, coasted, codetta, cognate, congest, consent, contend, content, contest, costate, cottage, deacons, decagon, decanes, decants, denotes, dentate, descant, descent, detects, detents, donates, dotages, enacted, encased, encodes, endnote, endogen, geostat, gestate, goateed, goatees, godsent, nascent, neatens, neatest, negated, negates, neonate, nondate, notated, octanes, octants, octenes, onstage, scanned, scatted, scented, snotted, standee, stented, tacnode, tangent, tangoed, tannest, tenants, tendons, tentage, toasted, tonnage