The word tetramerous 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 tetramerous
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Seven Letter Word Alert: (78 words)
armours, armrest, arouser, astuter, austere, emoters, erasure, erratum, estuate, euaster, maestro, matters, maturer, matures, measure, meteors, mortars, mutates, mutters, outmate, outrate, ratters, reamers, rearose, remates, remorse, remoter, remotes, reroast, reroute, restart, restate, restore, resumer, retaste, reteams, retears, retoast, retorts, retours, retreat, reutter, roamers, roaster, roseate, rosette, rostrum, rotates, rotters, routers, ruesome, serrate, smarter, smatter, smearer, starter, stature, steamer, stomate, stouter, stratum, tearers, toaster, torture, tourers, touters, treater, tremors, trouser, trustee, truster, turrets, tutoree, tutorer, ureters, uromere, urostea, utterer