The word taxidermist 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: 22
Highest Scoring Words With Friends™ Play In The Letters taxidermist
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Seven Letter Word Alert: (46 words)
admires, admixes, airiest, airside, airtime, aridest, artiest, astride, attired, attires, dairies, diaries, diarist, dietist, dirties, disrate, ditsier, ditties, editrix, imitate, iratest, irisate, matters, metrist, midairs, misdate, misedit, misread, mistier, mitiest, radixes, readmit, sidearm, siriema, smarted, smartie, smatter, started, stimied, striate, tastier, tidiers, tidiest, timider, tirades, tridems