Letters that make noncollapsable
s, a, o, b, e, l, n, p, c are letters that make 'noncollapsable'
Words within noncollapsable
AB, ab, PS, la, SA, non, sable, collapsable, able, on, no, lap, CO, LA, NC, col, LE, Co, La, No, PSA, olla, Ab are words within 'noncollapsable'