The word oleomargarine 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™ Play In The Letters oleomargarine
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Seven Letter Word Alert: (74 words)
aeolian, aerogel, aileron, aligner, almoner, angioma, angrier, areolae, areolar, armoire, arraign, arrange, earlier, earring, enlarge, geminal, general, germane, germier, gleaner, gmelina, gnarler, grainer, granola, gremlin, groaner, groomer, ionomer, ironage, laminae, laminar, learing, learner, leering, legroom, lineage, loamier, looming, loonier, manager, mangier, mangler, manlier, mariner, marring, meagrer, mealier, melange, mileage, mineral, mingler, mongrel, moorage, mooring, moraine, oranger, oregano, rangier, realgar, realign, reaming, rearing, reeling, regalia, regimen, regroom, reigner, reimage, relearn, roaming, roaring, romaine, roomier, rooming