Letters that make rarefaction
a, o, e, f, n, c, r, t, i are letters that make 'rarefaction'
Words within rarefaction
fact, act, re, fa, ti, faction, ref, AC, are, ar, rare, on, action, CT, RA, AR, Io, ion, Ra, Re, Ac, Ar, Ti are words within 'rarefaction'