The word dynamiters 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: 17
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (69 words)
admires, amenity, amnesty, antsier, anytime, aridest, artsmen, astride, damners, daytime, density, destain, destiny, detains, detrain, dietary, disrate, draymen, inmates, instead, maidens, marines, martens, martins, mastery, medians, midyear, minaret, minders, mindset, minters, misdate, misread, myriads, nastier, raiment, readmit, remains, remands, reminds, remints, restain, retains, retinas, sainted, sandier, sardine, seminar, sidearm, sideman, sirname, smarted, smarten, smartie, stained, stainer, stander, strayed, streamy, stymied, tandems, tinders, tindery, tirades, tradein, trained, tridems, triynes, yardmen