The word ceramicists 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: 20
Highest Scoring Words With Friends™ Play In The Letters ceramicists
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Seven Letter Word Alert: (37 words)
accites, actress, airiest, airtime, arctics, ascetic, ascites, casters, ceramic, cristae, critics, icemass, icteric, irisate, masters, metrics, miscast, miscite, misseat, misters, mistier, racemic, raciest, racisms, racists, recasts, satires, satiric, sciatic, screams, seismic, siriema, smartie, smiters, stimies, streams, tsarism