The word subcontinents 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: 23
Highest Scoring Words With Friends™ Plays In The Letters subcontinents
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Seven Letter Word Alert: (55 words)
biotest, bisects, bitsets, boniest, bonnets, bonuses, botnets, bounces, bucines, bunions, bunnies, busiest, butties, buttons, cession, cobnuts, consent, consist, content, contest, cosiest, cosines, cousins, cubists, ebonics, incests, insects, intents, intones, noncute, nonsuit, nosiest, notices, notists, oecists, outbets, outsets, outsits, section, sonnets, stetson, subnets, subnote, subsect, subsite, subtest, subtone, suction, sunnies, tension, teutons, tocsins, unbones, unction, unstoic