The word agglutinates 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™ Plays In The Letters agglutinates
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Seven Letter Word Alert: (82 words)
against, agatine, agatise, agitate, aiglets, anglist, attains, attunes, augites, aunties, elastin, elating, eluants, eluting, entails, galenas, ganglia, gateaus, gelatin, genials, genital, gestalt, getting, glisten, glueing, gluiest, glutens, guineas, gusting, gutting, iguanas, instate, inulase, lasagne, lasting, latents, latites, leasing, letting, ligates, lunates, luniest, lusting, lutites, nailset, nuggets, nutlets, salient, saltate, salting, satiate, sealant, sealing, seating, seguing, setting, signage, singlet, sinuate, situate, slating, snaggle, sniggle, snuggle, staging, stating, sultana, tagline, tailgun, talents, tangles, tasting, tautens, tauting, teasing, testing, tetanus, tingles, ugliest, unagile, unstage, utensil