The word labiodentals 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
Seven Letter Word Alert: (93 words)
abalone, ablated, ablates, abstain, adonise, aeolian, albedos, albinal, albinos, albites, alditol, aliased, anodise, astilbe, atonias, baldest, ballads, ballast, ballets, ballots, bandito, bandits, bandlet, bastion, batoids, betoils, billets, binodal, binodes, blasted, bloated, blondes, boasted, boldest, bolides, boniest, daltons, datable, delints, denials, dentals, dentils, destain, details, detains, diabase, dilates, disable, dollies, donates, elastin, elation, entails, indoles, install, instead, isolate, labials, labiate, leantos, lentils, lesbian, libated, libates, lintels, lionets, lobated, lobelia, losable, nabales, nailset, netball, niobate, noblest, notable, obtains, sainted, salable, salient, sealant, sealion, slanted, snailed, stabled, stained, stalled, stilled, stollen, tabloid, tallied, tallies, talonid, toenail