The word quartermaster 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: 26
Highest Scoring Words With Friends™ Play In The Letters quartermaster
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Seven Letter Word Alert: (53 words)
aerates, amateur, armrest, arrears, astuter, aurates, austere, equates, erasure, erratum, estuate, euaster, marquee, marques, marrers, matters, maturer, matures, measure, mutates, mutters, quarter, quartet, ratters, reamers, remates, request, restart, restate, resumer, retaste, reteams, retears, retreat, reutter, serrate, smarter, smatter, smearer, squarer, starter, stature, steamer, stratum, tartars, tearers, traumas, treater, trustee, truster, turrets, ureters, utterer