The word collagenases 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 collagenases
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Seven Letter Word Alert: (26 words)
ageless, alcogel, alleges, analogs, callose, cleanse, collage, college, congeal, egoless, encases, enclose, enolase, enseals, galenas, galleon, gallons, geocell, glances, lasagne, legless, locales, scalene, seances, slogans, solaces