Letters that make written communication
a, o, e, n, c, m, r, t, i, u, w are letters that make 'written communication'
Words within written communication
IT, communication, writ, ti, te, UN, IC, mu, at, en, RI, mm, TT, on, ten, ic, written, cat, CAT, CA, CO, cation, Io, ion, At, Ca, Co, Ni, Te, Ti are words within 'written communication'