The word disambiguating 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 disambiguating
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Seven Letter Word Alert: (52 words)
abasing, abating, abiding, abstain, abusing, against, ambiant, amusing, animist, badging, baiting, bandits, basting, batsman, biasing, bitings, budging, busting, daubing, dingbat, dumbing, dustbin, dusting, dustman, gaiting, gambits, gauding, gigabit, guiding, gusting, iambist, iguanas, imaging, indiums, matings, minibus, misting, mustang, sandbag, smidgin, smiting, stadium, staging, stamina, submaid, suiting, tabuing, tidings, timings, tsunami, tubings, unbaits