The word incendiarism 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: 21
Highest Scoring Words With Friends™ Plays In The Letters incendiarism
:
Seven Letter Word Alert: (63 words)
admires, airside, amnesic, arcsine, arsenic, asinine, cairned, candies, canines, cannier, carmine, carnies, cinders, cinemas, dairies, damners, dancers, denarii, diamine, diaries, diimine, dimeric, dinners, discern, icedams, icemans, imidine, incased, incised, indians, indices, innards, insaner, insider, irenics, iridise, maidens, manners, marines, medians, menisci, midairs, mincers, minders, misread, niacins, radices, remains, remands, reminds, rescind, sandier, sandmen, sardine, scanned, scanner, seminar, sericin, sidearm, sidecar, sideman, siriema, sirname