Letters that make cross-classification
s, a, o, f, l, n, c, r, t, i are letters that make 'cross-classification'
Words within cross-classification
CRO, os, OS, la, ti, si, IC, lass, Ross, FICA, cl, at, Cross, Ro, SI, SS, classification, cross, on, ic, as, cat, ass, class, CAT, AS, CA, LA, cation, Io, ion, Sif, As, At, Ca, Cl, Cr, La, Os, Si, Ti are words within 'cross-classification'