The word constructivist 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: 26
Highest Scoring Words With Friends™ Play In The Letters constructivist
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Seven Letter Word Alert: (38 words)
circuit, citrons, concurs, concuss, consist, convict, cousins, critics, iconist, incisor, incrust, intorts, intrust, intuits, invitro, ivorist, nitrous, notists, outsits, rustics, stuccos, succors, suction, suitors, tictocs, tocsins, tourist, tricots, tuition, uncross, unsorts, unstoic, vicious, victors, virions, viscous, visions, visitor