The word langbeinites 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
Seven Letter Word Alert: (88 words)
aiglets, aisling, albites, alibies, anglist, aniline, antigen, asinine, astilbe, bailing, baiting, baleens, bangles, basting, beagles, beanies, beating, beignet, belting, besting, biasing, biennia, bitings, eaglets, elastin, elating, elegant, elegist, elegits, enables, engines, entails, gelates, gelatin, genials, genital, gentian, gentile, gentles, giblets, glisten, ignites, inlines, intagli, intense, lasting, lateens, leanest, leaning, leasing, legates, lenient, lenites, lensing, lesbian, libates, ligates, lignins, lignite, lineage, lineate, linings, linnets, listing, nailing, nailset, neatens, negates, nesting, sailing, salient, salting, sealing, seating, sibling, silting, singlet, slating, tabling, tagline, tailing, tangles, teasing, tenable, tensile, tensing, tilings, tingles