The word interlopers 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
Seven Letter Word Alert: (96 words)
elopers, entries, epistle, epsilon, erotise, estriol, estrone, inepter, inerter, ironers, lenites, leptons, lionets, loiters, lorries, norites, nostril, onestep, openers, openest, orients, pelites, pelters, penlite, pentose, peonies, perlite, petiole, petrels, petrols, pioneer, pleions, poetise, pointer, politer, porters, postern, poteens, prenote, present, presort, printer, proline, pronest, protein, pterins, reinter, relents, reliers, relines, renters, reopens, repents, repiles, repilot, repiner, repines, replier, replies, replots, repoint, reports, reposer, reprint, reprise, reptile, rerents, rerinse, respelt, respire, respite, resplit, restore, retiles, retinol, retires, retries, rioters, roister, ropiest, roselet, serpent, snorter, spoiler, sterile, sterner, stonier, striper, tensile, terpine, toilers, topline, trienes, triones, triples, tripole