The word collectivising 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 collectivising
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Seven Letter Word Alert: (95 words)
ceiling, celling, cellist, clients, clinics, clitics, closing, cognise, coiling, colicin, colitis, collect, collies, collins, conceit, concise, congest, convect, convict, costing, covines, elicits, elision, elogist, eloigns, eosinic, eviting, glisten, gnostic, icicles, iconist, ignites, ileitis, illicit, illites, illitic, illogic, incites, inosite, instill, invects, invites, invoice, iolites, lection, legions, lentils, lignite, lilting, lingoes, lintels, lionets, lionise, listing, livings, longest, notices, novices, oiliest, oligist, olivine, ovicell, section, selling, siccing, sieving, silicic, silicle, silicon, silting, singlet, slicing, soiling, solicit, solvent, solving, stencil, stiving, stollen, telling, tilings, tilling, tingles, toiling, tolling, veiling, vesting, vetoing, violent, violets, violing, violins, violist, vitelli, voicing