The Collaborative International Dictionary of English v.0.48:

Acquirement \Ac*quire"ment\ (-ment), n.
   The act of acquiring, or that which is acquired; attainment.
   "Rules for the acquirement of a taste." --Addison.
   [1913 Webster]

         His acquirements by industry were . . . enriched and
         enlarged by many excellent endowments of nature.
                                                  --Hayward.
   [1913 Webster]

   Syn: Acquisition, Acquirement.

   Usage: Acquirement is used in opposition to a natural gift or
          talent; as, eloquence, and skill in music and
          painting, are acquirements; genius is the gift or
          endowment of nature. It denotes especially personal
          attainments, in opposition to material or external
          things gained, which are more usually called
          acquisitions; but this distinction is not always
          observed.
          [1913 Webster]

WordNet (r) 3.0 (2006):

acquirement
    n 1: an ability that has been acquired by training [syn:
         skill, accomplishment, acquirement, acquisition,
         attainment]