The word lifesavings 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 lifesavings
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Seven Letter Word Alert: (34 words)
aisling, failing, filings, finagle, finales, finials, finless, fissile, flanges, flavine, flavins, genials, leafing, leasing, leaving, liaises, ligases, livings, sailing, salines, salving, savings, sealing, sieving, sigfile, signals, silanes, silvans, singles, slaving, snivels, veiling, vialing, visages