The word aphrodisiacs 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: 21
Highest Scoring Words With Friends™ Plays In The Letters aphrodisiacs
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Seven Letter Word Alert: (21 words)
acrasid, airship, aphasic, ascarid, capsids, carhops, casspir, haircap, hairdos, isopach, orchids, pachisi, pariahs, pisoids, posadas, prosaic, raphids, raspish, scorias, soricid, spiroid