The word unapprehensive 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: 29
Highest Scoring Words With Friends™ Play In The Letters unapprehensive
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Seven Letter Word Alert: (72 words)
apprise, arsheen, arshine, avenues, ensnare, enviers, eupneas, happens, happier, harpies, heapers, heavens, heavers, heavier, heparin, hernias, insaner, inverse, nappers, nappies, nippers, parsnip, paupers, peepers, peevers, peevish, penners, pennies, pensive, perhaps, pinenes, pinesap, prevues, punners, punnier, purines, pushier, pushpin, ravines, reheaps, repaves, repines, repipes, reshape, reshave, reshine, revenue, rupiahs, sappier, seepier, shapeup, sharpen, sharpie, shipper, shunner, snapper, snipper, spanner, spinner, sunnier, unnerve, unpairs, unparse, unreeve, unrisen, unshare, upheave, upraise, uprisen, varnish, veneers, versine