The word respondents 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: 17
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (68 words)
denotes, densest, depones, deports, deposer, deposes, depress, deserts, despots, dessert, endnote, endorse, estrone, nesters, nondeep, oneness, onestep, openers, openest, pendent, penners, pentode, pentose, persons, pesters, poetess, ponders, portend, postern, posters, poteens, prenote, present, presets, pressed, pretend, pronest, redness, renests, rennets, reopens, repents, reposed, reposes, reposts, resends, resents, respond, respots, resteps, rodents, senders, serpent, snorted, sonnets, spender, spondee, sported, stenose, stepson, stereos, sterned, stoners, tenders, tendons, tenners, tensors, tressed