The word adulterants 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: 15
Highest Scoring Words With Friends™ Play In The Letters adulterants
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Seven Letter Word Alert: (76 words)
adrenal, adulate, antlers, arsenal, astuter, asunder, attends, attuned, attunes, aurates, austral, dataset, dentals, eluants, enlards, entrust, estrual, landers, latents, launder, lunated, lunates, natters, natural, natured, natures, neutral, nutlets, nutters, radulae, radulas, rattled, rattles, rentals, reslant, rustled, saltate, saltern, saluted, saluter, saunter, sealant, slander, slanted, slatted, snarled, stander, starlet, started, startle, statued, stature, sternal, strudel, student, stunted, stunter, sultana, talents, tartans, taunted, taunter, tautens, tetanus, truants, trundle, trusted, tundras, turtles, unalert, unalter, undealt, undrest, unrated, unsated, untread