The word advantageously 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: 26
Highest Scoring Words With Friends™ Play In The Letters advantageously
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Seven Letter Word Alert: (96 words)
adulate, advents, agendas, analogs, analogy, analyse, analyst, analyte, astound, daltons, dangles, datalog, daylong, dentals, dogvane, donates, dotages, eluants, galenas, gateaus, gaunted, gauntly, gelatos, gloated, glutens, godsent, goldens, gonadal, guldens, lasagna, lasagne, lavaged, lavages, layouts, leantos, longest, loudest, lounged, lounges, lovages, lunated, lunates, lysogen, nodules, nosegay, notedly, novelty, onstage, outages, outgave, outlays, outlead, outsang, ovately, ovulate, saluted, salvage, savaged, sealant, slanged, slanted, snouted, solvent, soundly, suavely, sultana, synodal, tangelo, tangled, tangles, tangoed, tongued, tongues, tousled, tuesday, undealt, ungodly, unloads, unloved, unsated, unsaved, unstage, vaguely, vaguest, valuate, vandals, vanload, vantage, vaulted, vaunted, vedanta, voltage, volutes, voyaged, voyages, yatagan