The word tobramycins 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: 23
Highest Scoring Words With Friends™ Play In The Letters tobramycins
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Seven Letter Word Alert: (38 words)
acronym, actions, atomics, atonics, baryons, bastion, botanic, cambist, cantors, carbons, carboys, cartons, cations, citrons, combats, corymbs, cratons, crayons, crimson, cystoma, cytomas, ironyms, marconi, martins, masonic, masonry, matrons, microns, myotics, obtains, rations, somatic, strobic, symbion, symbiot, trionym, trisomy, tyromas