The word mimeographing 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: 29
Highest Scoring Words With Friends™ Play In The Letters mimeographing
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Seven Letter Word Alert: (42 words)
epigram, gearing, gimpier, gimping, gingham, griming, griping, groping, hairpin, hammier, hamming, harming, harping, heaping, hearing, hemming, heparin, imagine, imaging, impinge, ironage, maiming, mangier, menorah, merging, moraine, origami, pairing, parging, perming, phonier, piggier, priming, ramming, reaming, reaping, repoman, rimming, roaming, romaine, romping, ropeman