The word repetitious 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
Seven Letter Word Alert: (43 words)
erotise, outstep, petites, pettier, pieties, pietist, piteous, pitiers, poetise, posture, potters, potties, pouters, poutier, pretest, protest, protist, putters, puttier, putties, respite, ropiest, rosette, soupier, spotter, spouter, sputter, stipite, stourie, stouter, testier, tipsier, tipster, tiptoer, tiptoes, toupees, tourist, touters, treetop, tropist, troupes, trustee, tutoree