The word deflationary 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 deflationary
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Seven Letter Word Alert: (73 words)
adrenal, aeolian, aileron, airdate, already, analyte, aneroid, arylate, defiant, delator, detrain, dietary, dilater, dilator, elation, fainted, fainter, faintly, fantail, fireant, flirted, floated, floater, foliate, fondler, forayed, foreday, forelay, frailty, frontal, fronted, indraft, inertly, inflate, inlayer, irately, lanyard, latrine, leotard, loftier, lyrated, notedly, ordinal, otarine, radiant, radiate, rainday, randily, ratline, readily, reality, refloat, reliant, retinal, retinol, tailfan, talonid, tanyard, tardily, tearily, tendril, tenfold, tiaraed, tindery, tiredly, toenail, tradein, trailed, trained, trefoil, trenail, trifled, trifold