The word trampoline 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: 18
Highest Scoring Words With Friends™ Play In The Letters trampoline
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Seven Letter Word Alert: (61 words)
aileron, ailment, aliment, almoner, elation, impaler, impanel, implant, implore, latrine, lempira, loamier, maltier, manlier, marlite, minaret, mineral, moraine, motlier, naptime, nepotal, netmail, opaline, operant, optimal, otarine, painter, palmier, pentail, pertain, pimento, plainer, planter, pointer, politer, praline, primate, proline, pronate, protean, protein, raiment, ratline, reliant, repaint, repilot, replait, replant, repoint, repoman, retinal, retinol, romaine, ropeman, toenail, tonearm, topline, toprail, trample, trenail, tripole