The word lightermen 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: 19
Highest Scoring Words With Friends™ Play In The Letters lightermen
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Seven Letter Word Alert: (24 words)
eighter, enlight, gentile, gentler, gremlin, heeling, hemline, integer, leering, lighten, lighter, meeting, melting, mingler, neither, reeling, regimen, rehinge, relight, ringlet, teeming, therein, tingler, treeing