The word childproofing 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: 29
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (36 words)
chiding, chlorin, choring, chorion, choroid, codling, coiling, cooling, cooping, cording, corndog, crinoid, dolphin, dooring, foghorn, foiling, folding, fooling, forcing, glochid, holding, hooding, hooping, looping, pinfold, pinhold, ploidic, poofing, poohing, pooling, pricing, priding, prolong, rifling, roiling, roofing