The word ambiversion 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: 22
Highest Scoring Words With Friends™ Play In The Letters ambiversion
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Seven Letter Word Alert: (32 words)
ambries, animose, anomers, bemoans, boranes, bovines, bravoes, bromine, bromise, enamors, evasion, ioniser, ironies, ivories, marines, misaver, moaners, moraine, noisier, oarsmen, ovaries, overman, ravines, remains, romaine, seminar, siriema, sirname, verismo, version, vibrios, virions