The word aggrandises 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: 17
Highest Scoring Words With Friends™ Plays In The Letters aggrandises
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Seven Letter Word Alert: (44 words)
agendas, aggrade, aggress, daggers, dangers, deraign, designs, diggers, digress, edgings, erasing, gainers, ganders, garaged, garages, gardens, gassier, gassing, gearing, gingers, grading, grained, grassed, ingress, naggers, radians, reading, regains, resands, resigns, saggers, saggier, sanders, sandier, sangria, sardine, searing, serging, signage, signers, singers, snagged, snagger, sringas