The word gadoliniums 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: 20
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (48 words)
agonism, aisling, almonds, amusing, angioid, dialing, dialogs, dilogun, dimuons, diosmin, domains, dousing, dualism, gliomas, indigos, indiums, inuloid, ladings, lamnoid, languid, lauding, liaison, ligands, lionism, loading, lousing, mailing, maligns, maudlin, mauling, misdial, mislaid, molding, monilia, moulins, mousing, mudlogs, sailing, sidling, sigmoid, sliding, sliming, smidgin, smiling, soiling, solanum, sundial, unloads