The word streptococcus is playable in Words With Friends™, but 1 blank substituting for the letter 'c' is 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: 22
Highest Scoring Words With Friends™ Plays In The Letters streptococcus
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Seven Letter Word Alert: (59 words)
copouts, corpses, corsets, cotters, courses, cutters, ecotour, escorts, estrous, octopus, oestrus, ousters, outcrop, outpost, outsets, outstep, percuss, poorest, poroses, poseurs, posters, posture, potters, pouters, precuts, process, protect, protest, putters, recoups, reposts, respots, scooper, scooter, scouter, sectors, soccers, sources, sourest, soursop, spotter, spouter, sprouts, spruces, sputter, stooper, stouter, stuccos, stupers, stupors, succors, sucrose, suspect, tooters, toruses, tosspot, touters, troupes, uproots