[1] : WordNet (r) 2.0

social class
     n : people having the same social or economic status; "the
         working class"; "an emerging professional class" syn: class,
          socio-economic class
see also:
class socio-economic class 

[2] : Moby Thesaurus II by Grady Ward, 1.0

27 moby thesaurus words for "social class":
   ashram, association, body, caste, clan, class, colony,
   commonwealth, commune, community, economic class, endogamous group,
   extended family, family, gens, kinship group, moiety,
   nuclear family, order, phratria, phratry, phyle, settlement,
   social circle, society, subcaste, totem

Class >> C Words
Class, definition of term: Class
class_pag1.html

Class Struggle >> C Words
Class Struggle, definition of term: Class Struggle
class+struggle_pag1.html

Class Library >> C Words
Class Library, definition of term: Class Library
class+library_pag1.html

Class Structure >> C Words
Class Structure, definition of term: Class Structure
class+structure_pag1.html