The word chloroplasts 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: 22
Highest Scoring Words With Friends™ Plays In The Letters chloroplasts
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Seven Letter Word Alert: (35 words)
alcohol, cahoots, caltrop, captors, carhops, carpool, castors, chloral, chorals, cohorts, collars, corolla, costars, harlots, locator, ooplast, pallors, pastors, patrols, portals, scallop, scholar, schools, schorls, scrolls, scrotal, shallot, sophtas, sortals, splatch, splotch, strolls, thralls, toparch, trollop