The word columnists 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: 19
Highest Scoring Words With Friends™ Play In The Letters columnists
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Seven Letter Word Alert: (21 words)
columns, consist, consuls, consult, cousins, cultism, customs, insults, locusts, miscuts, moulins, muslins, oculist, sitcoms, suction, tocsins, tonsils, unclots, uncoils, unlists, unstoic