WordNet (r) 3.0 (2006):

checking account
    n 1: a bank account against which the depositor can draw checks
         that are payable on demand [syn: checking account,
         chequing account, current account]

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "checking account":
   Swiss bank account, account, assets, balance, bank account,
   bank balance, bottom dollar, budget, cash reserves, charge account,
   command of money, credit account, exchequer, expense account,
   finances, fund, funds, kitty, life savings, means, moneys,
   nest egg, pecuniary resources, pocket, pool, purse, reserves,
   resources, savings, savings account, substance, treasure,
   unregistered bank account, wherewithal