The word functionally 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: 25
Highest Scoring Words With Friends™ Play In The Letters functionally
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Seven Letter Word Alert: (35 words)
acyloin, annuity, antlion, auction, callout, cannily, cannoli, caution, coalify, contain, faction, faculty, faintly, fallout, fancily, finally, flouncy, focally, funnily, infancy, lanolin, loftily, lunatic, nonclay, nonfact, nonflat, nonfull, nullify, nullity, outcall, outfall, toilful, tonally, unction, unfitly