Source : Webster's Revised Unabridged Dictionary (1913)

Liberalization \Lib`er*al*i*za"tion\ (-al*[i^]*z[=a]"sh[u^]n),
   n.
   The act of liberalizing.

Source : WordNet®

liberalization
     n : the act of making less strict [syn: {liberalisation}, {relaxation}]