The word collectivises 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: 25
Highest Scoring Words With Friends™ Play In The Letters collectivises
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Seven Letter Word Alert: (31 words)
cellist, ciscoes, clitics, closest, closets, coesite, colitis, collect, collies, cosiest, elicits, evilest, iceless, icicles, illites, iolites, oecists, oiliest, osselet, ossicle, ovicell, selects, silicle, solicit, tellies, tieless, toeless, vesicle, violets, violist, vitelli