The word gelatines 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: 13
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (38 words)
aiglets, anglist, eaglets, elastin, elating, elegant, elegist, elegits, entails, gelates, gelatin, genials, genital, gentile, gentles, glisten, lasting, lateens, leanest, leasing, legates, lenites, ligates, lineage, lineate, nailset, negates, salient, salting, sealing, seating, singlet, slating, tagline, tangles, teasing, tensile, tingles