The Collaborative International Dictionary of English v.0.48:

Capitalization \Cap"i*tal*i*za`tion\, n.
   1. The act or process of capitalizing.
      [1913 Webster]

WordNet (r) 3.0 (2006):

capitalization
    n 1: writing in capital letters [syn: capitalization,
         capitalisation]
    2: an estimation of the value of a business [syn:
       capitalization, capitalisation]
    3: the act of capitalizing on an opportunity [syn:
       capitalization, capitalisation]
    4: the sale of capital stock [syn: capitalization,
       capitalisation]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "capitalization":
   assets, available means, backing, balance, capital,
   capital gains distribution, capital goods, capital structure,
   circulating capital, corpus, deficit financing, equity capital,
   financial backing, financial support, financing, fixed capital,
   floating capital, fund, funding, grist, grubstake, holdings,
   liquid assets, means, moneyed capital, patronization, principal,
   property, provision of capital, resource, resources, sponsorship,
   stake, subsidy, supply, support, venture capital,
   working capital