The word chatterers 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™ Plays In The Letters chatterers
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Seven Letter Word Alert: (55 words)
archers, careers, carters, caterer, cerates, charter, chaster, chatter, cheater, crasher, craters, creaser, creates, etchers, hatters, hearers, heaters, hectare, ratchet, ratters, reacher, reaches, rechart, recheat, recrate, rehears, reheats, reshare, restart, restate, retaste, retches, reteach, retears, retrace, retract, retreat, scatter, serrate, shatter, shearer, starter, stretch, teacher, teaches, tearers, terrace, tethers, theater, theatre, thereat, threats, tracers, trasher, treater