Letters that make undistinguishable
s, a, b, d, e, g, l, n, h, t, i, u are letters that make 'undistinguishable'
Words within undistinguishable
AB, ab, GUI, ti, ting, UN, ng, HA, able, distinguishable, GU, in, sting, tin, IN, ND, Dis, LE, NGU, In, Nd, Ti, Ab, distinguish are words within 'undistinguishable'