The word liberalist 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: 15
Highest Scoring Words With Friends™ Play In The Letters liberalist
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Seven Letter Word Alert: (41 words)
airiest, albites, alibies, astilbe, baiters, ballets, barites, billets, bitsier, blaster, blister, braille, bristle, illites, irisate, libates, liberal, literal, rallies, realist, rebaits, rebills, reblast, retails, retills, riblets, rillets, risible, saltier, sillier, siltier, slatier, stabler, stellar, stiller, tallier, tallies, tillers, trellis, triable, tribals