The word chatterboxes 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: 27
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (92 words)
abetter, abettor, abortee, acerose, batches, bathers, batters, beaches, beaters, berates, betroth, betters, boaster, boaters, borates, borscht, botcher, botches, bothers, boxcars, boxtree, breathe, breaths, cashbox, cerates, chaster, chatter, cheater, coaster, coaxers, coheres, costate, cotters, creates, earshot, echoers, etchers, exacter, exactor, exarchs, excreta, exhorts, extorts, extract, hatters, heaters, hectare, herbose, heteros, hoaxers, oxcarts, oxheart, ratchet, reaches, rebatch, rebates, rebathe, rebaths, reboast, reboxes, recheat, rechose, recoats, reheats, restate, retaste, retaxes, retches, reteach, retoast, roaches, roseate, rosette, rotates, scatter, shatter, sherbet, sorbate, stretch, teacher, teaches, tethers, texters, theater, theatre, thereat, thereto, threats, throats, toaster, torches, trochee