The word conspicuousness 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™ Play In The Letters conspicuousness
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Seven Letter Word Alert: (29 words)
cession, ciscoes, concise, concuss, copious, cosines, coupons, cousins, ionones, nonepic, oncosis, osseins, osseous, pension, poisons, possess, pounces, pussies, sconces, session, sinuous, sinuses, spinons, spinose, spinous, spouses, success, sunnies, uncoops