The word immunochemical is playable in Words With Friends™, but 1 blank substituting for the letter 'm' is 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: 30
Highest Scoring Words With Friends™ Plays In The Letters
Seven Letter Word Alert: (33 words)
aclinic, ammonic, calcine, calcium, caliche, cauline, chalice, chancel, choleic, choline, coalmen, cocaine, cochlea, coeliac, colicin, comical, commune, conceal, conical, council, holmium, laconic, leucoma, machine, mailmen, manhole, meconic, minicam, minimal, minimum, monilia, nucleic, oceanic