The word ergocalciferol 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: 27
Highest Scoring Words With Friends™ Play In The Letters ergocalciferol
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Seven Letter Word Alert: (46 words)
aerogel, aircell, aircool, alcogel, alleger, allegro, calicle, caloric, calorie, caroler, circler, clearer, coalier, coeliac, coercer, collage, college, collier, colorer, corolla, earlier, elegaic, elegiac, fiercer, foliage, foliole, forager, foreleg, forelie, forgoer, fragile, frailer, geocell, glacier, goofier, gorilla, gracile, griller, icecool, icefall, icefloe, leafier, logical, ocellar, recolor, reforge