The word amalgamations 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 amalgamations
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Seven Letter Word Alert: (31 words)
against, agnosia, agonism, agonist, amalgam, amanita, amastia, ammonia, amongst, analogs, angioma, anglist, animals, atomism, atonias, gliomas, gnomist, laminas, lasagna, lasting, mailman, maligns, malting, matings, miasmal, moating, molting, salting, sangoma, slating, stamina