The word multiparous 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: 20
Highest Scoring Words With Friends™ Plays In The Letters multiparous
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Seven Letter Word Alert: (37 words)
armpits, atriums, imparts, impasto, imports, lipomas, mistral, mortals, morulas, mutuals, optimal, outraps, outsail, outspar, palmist, patrols, portals, primost, primula, prismal, pursuit, rituals, slipout, stipula, stromal, sutural, tailors, toprail, toprims, topsail, tourism, tumours, turmoil, umlauts, uprisal, upstair, utopias