The word liberators 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: 14
Highest Scoring Words With Friends™ Plays In The Letters liberators
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Seven Letter Word Alert: (61 words)
aborter, albites, arbiter, artsier, astilbe, baiters, barites, barrels, barters, betoils, blaster, blister, bloater, boaster, boaters, boilers, bolster, bolters, borates, braiser, brasier, bristle, bristol, broiler, estriol, isolate, laborer, libates, libator, lobster, loiters, lorries, orbital, orbiter, rarebit, realist, realtor, rebaits, reblast, reboast, reboils, reroast, retails, retrial, riblets, rioters, roaster, roister, rostral, saltier, slatier, sorbate, sorbite, stabler, tailors, tarries, toilers, trailer, triable, tribals, trilobe