WordNet (r) 3.0 (2006):

sexism
    n 1: discriminatory or abusive behavior towards members of the
         opposite sex

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "sexism":
   Jim Crow, Jim Crow law, anti-Semitism, apartheid, black power,
   black supremacy, chauvinism, class consciousness,
   class distinction, class hatred, class prejudice, class war,
   color bar, color line, discrimination, fascism, know-nothingism,
   male chauvinist, minority prejudice, race hatred, race prejudice,
   race snobbery, racial discrimination, racialism, racism,
   red-baiting, segregation, sex discrimination, social barrier,
   social discrimination, superpatriotism, ultranationalism,
   white power, white supremacy, xenophobia