The word imparipinnate 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: 24
Highest Scoring Words With Friends™ Play In The Letters imparipinnate
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Seven Letter Word Alert: (33 words)
airpipe, airtime, amentia, animate, aptamer, apteria, entrain, imprint, inertia, interim, mantrap, martian, martini, minaret, miniate, mintier, naptime, nippier, painter, parapet, patinae, pertain, pinnate, primate, raiment, rampant, remnant, repaint, tapeman, termini, timpani, tinnier, tippier