The word interpolations 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: 20
Highest Scoring Words With Friends™ Play In The Letters interpolations
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Seven Letter Word Alert: (315 words)
aerosol, aileron, airiest, airline, alpines, altoist, aniline, anoints, antlers, antlion, antsier, aplites, apostle, artiest, asinine, aspirin, atoners, attires, elastin, elation, elision, elitist, ensnarl, entails, entrain, entrant, entraps, epsilon, erosion, estriol, inertia, inlines, inosine, inosite, insaner, inspire, instant, instate, intents, interns, intoner, intones, intorts, introns, iolites, ioniser, ionones, iratest, irisate, ironies, isolate, isotope, lantern, latents, latites, latrine, leantos, leptons, liaison, linnets, lintier, lionets, lionise, liriope, litters, loaners, loiters, loonier, loonies, loopier, looters, lotions, nailers, nailset, nastier, nations, natters, nattier, nepotal, nitrate, nitrite, nittier, noisier, nonarts, nonlate, nonleap, nonliar, nonpros, nonreal, nonriot, nonsale, nonslip, nonstop, norites, nostril, notator, notions, oiliest, oleosin, onliner, oolites, ooplast, opaline, operant, operons, opiates, opinion, options, oration, orients, orioles, orleans, otarine, otolite, painter, palters, panters, panties, parents, paroles, parties, pastier, patents, patient, patines, patriot, patrols, patrons, pattern, patters, patties, pension, pentail, persona, pertain, petrols, pianist, piarist, pietist, pilates, pinions, pinitol, pinnate, pintail, pirates, pitiers, plainer, planers, planets, planner, planter, plaster, platers, platoon, platter, pleions, plosion, plotter, pointer, polaron, politer, pontine, poorest, portals, portent, portion, portlet, postern, potions, potters, potties, pottles, praline, prattle, pretans, proline, pronate, pronest, protean, protein, protest, protist, protons, pterins, rations, ratline, rattles, rattons, rattoon, realist, reliant, reloans, renails, rentals, repaint, repilot, replait, replans, replant, replots, repoint, reslant, resplit, respool, restain, retails, retains, retilts, retinal, retinas, retinol, retints, retoast, retools, retotal, risotto, rootlet, ropiest, roseola, rotates, salient, saltern, saltier, saponin, sealion, seaport, senator, siltier, sirloin, slatier, slitter, snooper, snotter, soapier, sootier, soprano, spaniel, spanner, spatter, spinier, spinner, spinnet, spittle, spoiler, spooler, sporont, spotlit, spotter, stainer, stapler, starlet, starlit, startle, station, sternal, stilter, stipite, stonier, stoolie, stooper, straint, striate, tailors, tailpin, talents, tanners, tannest, taproot, tapster, tastier, teapots, tenants, tenpins, tension, tertial, tiepins, tilters, tiniest, tinners, tinnier, tinpots, tinters, tintier, tipsier, tipster, tiptoer, tiptoes, toaster, toenail, toilers, toilets, toolers, toolset, toonies, tooters, tootler, tootles, tootsie, topline, toprail, topsail, topsoil, tornote, torsion, traipse, transit, treason, trenail, trepans, triones, triples, triplet, tripole, triptan, tropist