The word conductivities 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: 27
Highest Scoring Words With Friends™ Play In The Letters conductivities
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Seven Letter Word Alert: (81 words)
codices, coedits, conceit, concise, conduce, conduct, conduit, contest, convect, convict, counted, covines, cuisine, decocts, deictic, deistic, dentist, devious, diciest, diction, dietics, dietist, dioecic, ditties, dittoes, divines, dotiest, doviest, dunites, edition, envious, eosinic, eudicot, iconist, idiotic, incised, incited, incites, indices, indicts, indites, induces, inducts, inosite, intuits, invects, invited, invites, invoice, iodines, iodites, ionised, noticed, notices, novices, outside, ovicide, oviduct, sconced, scouted, section, snotted, snouted, stinted, student, stunted, suction, suicide, tedious, teutons, tictocs, tidiest, tiniest, tuition, uncited, unities, unstoic, uveitis, vicious, vidicon, visited