The word acetaldehydes 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: 23
Highest Scoring Words With Friends™ Play In The Letters acetaldehydes
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Seven Letter Word Alert: (59 words)
acetyls, acylase, acylate, caseate, castled, cathead, chalets, cheated, cheesed, chelate, chested, clashed, dactyls, deadest, deadeye, dealate, deashed, deathly, decadal, decades, decayed, decease, delated, delates, delayed, deleads, deleted, deletes, descale, deshade, elected, eyelash, eyelets, hayseed, headset, healded, lactase, latched, latches, leached, leaches, leadeth, leashed, leeched, leeches, lychees, satchel, scalded, scathed, scythed, seceded, sedated, seethed, sheeted, sleeted, steeled, teaches, yachted, yeasted