The word tetraspore 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: 13
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (52 words)
operate, parrots, patters, porters, potters, praetor, praters, presort, pretest, prorate, protest, raptors, ratters, reapers, rearose, reparse, repaste, repeats, reports, reposer, rerapes, reroast, restart, restate, restore, restrap, retapes, retaste, retears, retoast, retorts, retraps, retreat, roaster, roseate, rosette, rotates, rotters, seaport, septate, serrate, spatter, spearer, spotter, starter, taperer, tapster, teapots, tearers, toaster, treater, treetop