The word blasphemer 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 blasphemer
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Seven Letter Word Alert: (23 words)
amblers, amperes, besmear, blamers, hampers, healers, heapers, helpers, herbals, leapers, marbles, plasher, pleaser, presale, rambles, rebales, reblame, reheaps, relapse, repeals, reshape, sampler, shamble