The word disinfected 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: (36 words)
deceits, decides, defects, defends, deficit, defined, defines, deicide, deified, deifies, deistic, deities, descend, descent, destine, diciest, dietics, dieties, dietine, distend, edifice, edified, edifies, eidetic, enticed, entices, incised, incited, incites, indices, indicts, indited, indites, infects, scented, teddies