The word spermatozoan 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: 28
Highest Scoring Words With Friends™ Play In The Letters spermatozoan
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Seven Letter Word Alert: (74 words)
anapest, anomers, apozems, aptamer, artsman, artsmen, atoners, azoteas, enamors, entraps, maestro, mantrap, mantras, maroons, martens, matrons, mentors, meronts, mesozoa, moaners, monster, moorpan, oarsman, oarsmen, oosperm, operant, operons, osteoma, ozonate, panters, parents, patrons, peasant, persona, poorest, poromas, postern, postman, postmen, pretans, promote, pronate, pronest, prosoma, protean, protons, rampant, repoman, restamp, ropeman, seaport, searoom, senator, smarten, snooper, snoozer, soprano, spartan, sporont, stamper, stomper, stooper, tampers, tampons, tapeman, taproom, tarpans, tearoom, tonearm, topazes, treason, trepans, zapateo, zonates