The word sublieutenant 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: 21
Highest Scoring Words With Friends™ Plays In The Letters sublieutenant
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Seven Letter Word Alert: (82 words)
abluent, ablutes, albites, annulet, annulus, astilbe, attunes, auletes, aunties, baleens, batlets, battens, battles, beanies, betitle, bunnies, butanes, butenes, butties, elastin, eluants, eluates, eluents, enables, ensuite, entails, entitle, estuate, instant, instate, intense, intents, inulase, lateens, latents, latites, leanest, lenient, lenites, lesbian, libates, lineate, linnets, lunates, luniest, lutites, nailset, neatens, neatest, nebulae, nebulas, nettles, nutlets, salient, sinuate, situate, subunit, sunbelt, tabinet, tablets, talents, tannest, tautens, telnets, tenable, tenants, tensile, tetanus, tubules, tubulin, tunable, tunnels, unbaits, unbales, unbelts, unblent, unblest, unbuilt, uneaten, unstain, useable, utensil