The word oneiromancy 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: 21
Highest Scoring Words With Friends™ Play In The Letters oneiromancy
:
Seven Letter Word Alert: (24 words)
acronym, annoyer, anymore, cannery, cannier, canonry, carmine, cyanine, economy, incomer, ionomer, ironman, marconi, monoecy, moraine, moronic, nomancy, nonamer, oeconym, omicron, oomancy, reannoy, romaine, romance