The word crystallography 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: 31
Highest Scoring Words With Friends™ Play In The Letters crystallography
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Seven Letter Word Alert: (74 words)
acrylyl, allstar, ashtray, asphalt, astylar, atrophy, caltrap, caltrop, calypso, captors, carhops, carpals, carport, carrots, carroty, catalog, catarrh, chloral, chorals, coaltar, coastal, collars, corrals, cotylar, crayola, crystal, gallops, galtrap, galtrop, ghastly, ghostly, glycols, glyptal, gotchas, gyrator, haplogy, harlots, haycaps, loathly, loyalty, pallors, paralog, parasol, parlays, parlors, parrots, patrols, payroll, phrasal, playact, polarly, portals, portray, pyocyst, raptors, rostral, royally, royalty, satrapy, scallop, scholar, schorly, scrotal, shallot, sharply, shortly, splatch, splotch, starchy, tallyho, thralls, toparch, trocars, trochar