Letters that make imperfectibility
b, e, f, l, p, c, m, r, t, i, y are letters that make 'imperfectibility'
Words within imperfectibility
ER, RF, perfectibility, IT, pe, ti, EC, MP, lit, perfect, imperfect, il, li, ECT, CT, IL, TiB, imp, Bi, Er, Fe, Li, Rf, Ti are words within 'imperfectibility'