WordNet (r) 3.0 (2006):

acculturation
    n 1: the adoption of the behavior patterns of the surrounding
         culture; "the socialization of children to the norms of
         their culture" [syn: socialization, socialisation,
         acculturation, enculturation]
    2: all the knowledge and values shared by a society [syn:
       acculturation, culture]
    3: the process of assimilating new ideas into an existing
       cognitive structure [syn: acculturation, assimilation]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "acculturation":
   Americanization, admission, adoption, affiliation, assimilation,
   citizenship by naturalization, citizenship papers, civility,
   civilization, complex, cultivation, cultural drift, culture,
   culture area, culture center, culture complex, culture conflict,
   culture contact, culture pattern, culture shock, culture trait,
   education, enculturation, enlightenment, ethos, folkways,
   key trait, mores, nationalization, naturalization,
   naturalized citizenship, papers, polish, refinement, socialization,
   society, trait, trait-complex