The word epistolary 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: 16
Highest Scoring Words With Friends™ Play In The Letters epistolary
:
Seven Letter Word Alert: (58 words)
aplites, apostle, estriol, irately, isolate, isotype, leprosy, loiters, opiates, paisley, palters, parleys, paroles, parsley, parties, pastier, patrols, petrols, pilates, pirates, plaster, platers, players, politer, portals, prelaty, pteryla, pyrites, realist, reality, repilot, replait, replays, replots, resplit, retails, ropiest, saltier, seaport, slatier, soapier, soapily, sparely, splayer, spoiler, stapler, stripey, stylier, tailors, tearily, toilers, topiary, toprail, topsail, traipse, triples, tripole, trysail