The word congruities 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: 18
Highest Scoring Words With Friends™ Play In The Letters congruities
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Seven Letter Word Alert: (85 words)
cistern, citrine, citrons, cognise, coiners, congest, coreign, cornets, costing, counter, cretins, cringes, cronies, cuisine, cursing, encrust, eosinic, erotics, gnostic, goiters, goitres, goriest, goutier, gunters, gustier, gutsier, iconist, igneous, igniter, ignites, ignitor, ignores, incisor, inciter, incites, incrust, inosite, ioniser, irenics, ironies, nitrous, noisier, norites, notices, nutsier, orients, origins, ousting, outgrin, outings, recoins, recount, regions, reicing, resting, reusing, rioting, rousing, routine, routing, rusting, scoring, scourge, scouter, scrouge, section, sericin, sorting, souring, stinger, stonier, storing, stourie, suction, suiting, surgeon, tiering, tongues, tonsure, touring, triones, trounce, uniters, unities, unstoic