The word spaceflights 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 spaceflights
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Seven Letter Word Alert: (85 words)
achiest, aflight, aiglets, aitches, alethic, alights, aplites, ascites, aseptic, ashiest, aspects, cagiest, caliphs, capless, caplets, castile, castles, catfish, cesspit, chaises, chalets, chapels, chaplet, chipset, chisels, clashes, elastic, ethical, falsest, fascist, felsics, fiestas, filches, flashes, fleapit, flights, gapless, geishas, gelcaps, haglets, halites, hapless, haplite, haptics, hatless, hepatic, hisself, laciest, latches, ligases, ligates, lipases, palsies, pastels, pasties, patches, pelagic, pigface, piglets, pilates, pitches, pitless, plashes, plastic, plicate, plights, sachets, sagiest, satchel, scathes, schleps, selfact, selfish, septics, sleighs, sleight, slights, spastic, special, spicate, splatch, splices, staples, stifles, tipless