The word contiguities 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: 19
Highest Scoring Words With Friends™ Plays In The Letters contiguities
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Seven Letter Word Alert: (31 words)
cognise, congest, contest, costing, cuisine, cutting, egotist, eosinic, gnostic, iconist, igneous, ignites, incites, inosite, intuits, notices, ousting, outings, section, setting, sitting, suction, suiting, testing, teutons, tiniest, tongues, touting, tuition, unities, unstoic