The word antiquaries 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: 22
Highest Scoring Words With Friends™ Play In The Letters antiquaries
:
Seven Letter Word Alert: (28 words)
airiest, antique, antsier, artisan, atresia, aunties, aurates, inertia, inquest, inquiet, inquire, irisate, nastier, natures, nutsier, qintars, querist, restain, retains, retinas, saunter, saurian, sinuate, stainer, tsarina, uniters, unities, urinate