The word marriageable 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 marriageable
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Seven Letter Word Alert: (24 words)
airable, algebra, amiable, balmier, bargirl, barmier, barrage, begrime, earlier, gambler, garbler, gerbera, germier, mailbag, malaria, marbler, meagrer, mealier, mileage, rambler, realgar, reblame, regalia, reimage