The word flirtatiously 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 flirtatiously
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Seven Letter Word Alert: (46 words)
airfoil, airlift, altoist, arillus, fallout, falsity, firstly, fistula, flatout, florals, florist, flutist, frailly, frailty, layouts, listful, loftily, lousily, lustily, outfall, outfast, outfits, outlast, outlays, outsail, outstay, rituals, rustily, saltily, starlit, storify, stoutly, surlily, tailors, tastily, titular, toilful, totally, tourist, trayful, tryouts, trysail, tuftily, tutorly, utility, yttrias