The Collaborative International Dictionary of English v.0.48:

Nursemaid \Nurse"maid`\, n.
   A girl or woman employed to attend and care for children.
   [1913 Webster]

WordNet (r) 3.0 (2006):

nursemaid
    n 1: a woman who is the custodian of children [syn: nanny,
         nursemaid, nurse]

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "nursemaid":
   abigail, amah, au pair girl, ayah, betweenmaid, biddy, chambermaid,
   chaperon, companion, cook, dry nurse, duenna, femme de chambre,
   fille de chambre, gentlewoman, girl, governess, handmaid,
   handmaiden, hired girl, housemaid, kitchenmaid, lady-help,
   lady-in-waiting, live-in maid, live-out maid, maid, maidservant,
   mammy, nanny, nurse, nurserymaid, parlormaid, scullery maid,
   servant girl, servitress, sitter, soubrette, tweeny, upstairs maid,
   waiting maid, wench, wet nurse