The word hydroplaning 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: 25
Highest Scoring Words With Friends™ Plays In The Letters hydroplaning
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Seven Letter Word Alert: (48 words)
adoring, alphorn, andiron, angrily, darling, darning, daylong, diglyph, digraph, dipolar, dolphin, draping, draying, droning, goldpan, grandly, handily, handing, haplogy, haploid, hardily, harping, holding, holiday, hyaloid, hypnoid, landing, larding, loading, loaning, nondrip, nonliar, nonpaid, nonplay, ordinal, phonily, phoning, pinhold, planing, playing, praying, prodigy, randily, rapidly, roaning, yarding, yarning, yodling