[1] : WordNet (r) 2.0

mom
     n : informal terms for a mother syn: ma, mama, mamma, momma,
          mommy, mammy, mum, mummy, mater
see also:
ma mama mamma momma mommy mammy 
mum mummy mater 

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

18 moby thesaurus words for "mom":
   dam, foster mother, genetrix, ma, mam, mama, mammy, mater,
   materfamilias, maternal ancestor, matriarch, mommy, mother, mummy,
   old lady, old woman, stepmother, the old woman

[3] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

mom
     message orientated middleware ibm
     
     

Mom >> M Words
Mom, definition of term: Mom
mom_pag1.html