Letters that make undecomposable
s, a, o, b, d, e, l, n, p, c, m, u are letters that make 'undecomposable'
Words within undecomposable
os, OS, AB, ab, comp, PO, EC, MP, SA, UN, sable, able, decomposable, deco, dec, CO, DE, ND, Po, LE, Co, Nd, Os, Dec, Ab are words within 'undecomposable'