The Collaborative International Dictionary of English v.0.48:

Squaw \Squaw\ (skw[add]), n. [Massachusetts Indian squa, eshqua;
   Narragansett squ[^a]ws; Delaware ochqueu, and khqueu; used
   also in compound words (as the names of animals) in the sense
   of female.]
   A female; a woman, especially a married woman; a wife; -- in
   the language of Indian tribes of the Algonquin family,
   correlative of sannup. [Considered offensive by some American
   indians.]
   [1913 Webster +PJC]

   Old squaw. (Zool.) See under Old.
      [1913 Webster]

WordNet (r) 3.0 (2006):

squaw
    n 1: an American Indian woman

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "squaw":
   Eve, Frau, better half, common-law wife, concubine, dame,
   daughter of Eve, distaff, domina, donna, dowager, feme,
   feme covert, femme, frow, gentlewoman, girl, goodwife, goody,
   helpmate, helpmeet, lady, lass, married woman, matron, milady,
   old lady, old woman, rib, vrouw, wahine, weaker vessel,
   wedded wife, wife, woman