The word radicalizes 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: 25
Highest Scoring Words With Friends™ Play In The Letters
Seven Letter Word Alert: (33 words)
acidize, acrasid, aedilic, aerials, airside, aliased, arcades, ascarid, caldera, cradles, crazies, dailies, dairies, decrial, deliria, derails, dialers, diaries, drazels, eclairs, laicise, laicize, liaised, lizards, radials, radical, radicel, radices, radicle, reclads, redials, scalier, sidecar