The word evangelising 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: 23
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (41 words)
aisling, angling, aniline, asinine, avenges, engages, engines, enliven, enslave, evening, gaining, genials, gingiva, ginseng, givings, inlines, leaning, leasing, leavens, leaving, lensing, lignins, lineage, linings, livings, nailing, sailing, salving, sealing, sieging, sieving, signage, signing, singing, slaving, snaggle, sniggle, veggies, veiling, veining, vialing