The word excursionist 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: 24
Highest Scoring Words With Friends™ Plays In The Letters excursionist
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Seven Letter Word Alert: (94 words)
censors, cession, cistern, citrine, citrons, coexist, coiners, consist, cornets, corsets, cosiest, cosines, counter, courses, cousins, coxitis, cretins, cronies, cruises, cuisine, encrust, eosinic, erotics, escorts, estrous, exciton, excitor, exotics, iciness, iconist, incests, incises, incisor, inciter, incites, incrust, inosite, insects, inserts, insures, ioniser, ionises, irenics, ironies, nitrous, noisier, norites, nosiest, notices, nutsier, oecists, oestrus, orients, ousters, recoins, recount, rosiest, routine, rustics, scouter, section, sectors, seniors, sericin, serious, sextons, sinters, sixties, sorties, sources, sourest, stoners, stonier, stories, stourie, sucrose, suction, suiters, suitors, sunrise, tensors, tocsins, tonsure, toruses, triones, trounce, uncross, uniters, unities, unrests, unsorts, unstoic, xerosis, xerotic