The word gastronomic 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: (66 words)
actions, agnosic, agonism, agonist, amongst, atomics, atonics, cantors, carting, cartons, cartoon, casting, cations, citrons, coating, comings, consort, coronas, costing, crating, cratons, crimson, gastric, gastrin, gnomist, gnostic, isogram, marconi, margins, maroons, martins, masonic, matings, matrons, microns, migrant, moating, monitor, mooring, mooting, moronic, motions, octagon, omicron, orating, oration, organic, osmotic, racoons, ratings, rations, roaming, rooming, rooting, scaring, scoring, scotoma, signora, soaring, somatic, sooting, sorting, staring, storing, torsion, tracing