The word steamfitters 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: 18
Highest Scoring Words With Friends™ Plays In The Letters steamfitters
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Seven Letter Word Alert: (84 words)
aeriest, artiest, artists, attests, attires, attrist, attrite, easiest, emirate, emitter, estates, faeries, fairest, fastest, fattest, fattier, fatties, festers, fetters, fiestas, firmest, fitters, fittest, freesia, iratest, itemset, iterate, masters, matters, meatier, messier, metrise, metrist, misseat, misters, reemits, remates, reseats, resifts, restate, restems, retaste, reteams, retests, retimes, satires, seamers, seamier, seaters, seriate, seriema, setfast, setters, siamese, sifters, sitters, smartie, smatter, smiters, staters, statism, statist, steamer, straits, streams, streets, striate, strifes, tartest, tasters, tastier, tatters, tattier, teasers, teatime, termite, tersest, testate, testers, testier, titrate, titters, tsarism, tsarist