The word heliographing 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: 26
Highest Scoring Words With Friends™ Play In The Letters heliographing
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Seven Letter Word Alert: (49 words)
aileron, airhole, airline, aligner, alphorn, eloping, gaoling, gearing, girling, glaring, goaling, griping, groping, haggler, hailing, hairpin, halogen, harelip, harping, healing, heaping, hearing, helping, heparin, hernial, inhaler, ironage, lairing, leaping, learing, leghorn, liriope, niggler, opaline, pairing, parging, pealing, pergola, phonier, piggier, pingler, pinhole, plainer, praline, proline, railing, realign, reaping, roiling