The word evangelism 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 evangelism
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Seven Letter Word Alert: (27 words)
avenges, enamels, enigmas, enslave, geminal, genials, gmelina, leasing, leavens, leaving, lineage, maglevs, maligns, mangles, meanies, melange, menages, mileage, mingles, misgave, salving, sealing, seaming, seeming, seminal, slaving, velamen