The word oxidoreduction 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: 28
Highest Scoring Words With Friends™ Plays In The Letters oxidoreduction
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Seven Letter Word Alert: (53 words)
citrine, conduit, contour, coronet, counted, counter, courted, crinoid, crooned, crouton, crunode, dextrin, diction, diorite, dioxide, dirtied, ecotour, edition, editrix, eductor, eudicot, exciton, excitor, incited, inciter, indited, inditer, induced, inducer, intrude, ioduret, nitride, noticed, outdoer, outdone, outdoor, outride, outrode, recount, redound, rounded, routine, trodden, trounce, turdoid, uncited, uncoded, uncored, undried, untired, untried, uridine, xerotic