[1] : WordNet (r) 2.0

mother superior
     n : the superior of a group of nuns syn: abbess, prioress
see also:
abbess prioress 

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

27 moby thesaurus words for "mother superior":
   abbess, canoness, chatelaine, clergywoman, conventual, dame,
   dowager, first lady, goodwife, governess, great lady, homemaker,
   housewife, lady superior, madam, matriarch, matron, mistress,
   novice, nun, postulant, prioress, religieuse, secular canoness,
   sister, superioress, the reverend mother

Mother Superior >> M Words
Mother Superior, definition of term: Mother Superior
mother+superior_pag1.html

Mother >> M Words
Mother, definition of term: Mother
mother_pag1.html

Mother Tongue >> M Words
Mother Tongue, definition of term: Mother Tongue
mother+tongue_pag1.html

Mother Wit >> M Words
Mother Wit, definition of term: Mother Wit
mother+wit_pag1.html

Mother Hubbard >> M Words
Mother Hubbard, definition of term: Mother Hubbard
mother+hubbard_pag1.html

Mother Goose >> M Words
Mother Goose, definition of term: Mother Goose
mother+goose_pag1.html

Mother Board >> M Words
Mother Board, definition of term: Mother Board
mother+board_pag1.html

Mother Cell >> M Words
Mother Cell, definition of term: Mother Cell
mother+cell_pag1.html

Mother Fucker >> M Words
Mother Fucker, definition of term: Mother Fucker
mother+fucker_pag1.html