The word thyroglobulin 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: 26
Highest Scoring Words With Friends™ Play In The Letters thyroglobulin
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Seven Letter Word Alert: (41 words)
bighorn, bigotry, biology, blighty, bluntly, bolting, booting, borough, botulin, brought, bulling, bullion, buoying, burling, burying, hooting, hulling, hurling, hurting, lightly, liturgy, looting, nightly, nullity, obligor, outgrin, rightly, rolling, rollout, rooting, roughly, routing, thrilly, tolling, tooling, toughly, touring, trilogy, urolith, urology, yoghurt