The word disinfections 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: 22
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (67 words)
cession, coedits, confess, confide, confine, confits, consent, consist, contend, cosiest, cosines, deficit, deistic, dentins, diciest, diction, dietics, dissect, dissent, edition, eosinic, fiction, fission, fitness, foisted, fondest, iciness, iconist, idiotic, incests, incised, incises, incited, incites, indents, indices, indicts, indites, infects, infests, inosine, inosite, insects, insides, intends, intoned, intones, iodines, iodises, iodites, ionised, ionises, nondiet, nosiest, noticed, notices, oecists, seconds, section, sinoids, snidest, softens, softies, sonnets, tendons, tension, tocsins