The word competitors 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: 20
Highest Scoring Words With Friends™ Play In The Letters competitors
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Seven Letter Word Alert: (57 words)
comport, compose, compost, compote, cooties, copiers, cotters, erotics, imports, imposer, isotope, metrics, metrist, moister, mopiest, mortise, mottoes, omitter, oosperm, osmotic, permits, poetics, poorest, porotic, portico, potters, potties, primost, promise, promote, prootic, protect, protest, protist, risotto, ropiest, scooper, scooter, scorpio, sootier, spermic, spotter, stomper, stooper, tipmost, tipster, tiptoer, tiptoes, tooters, tootsie, topmost, toprims, triceps, tricots, trisect, tropics, tropist