Importprivkey's "label" - is it the same as an account?
Though the terminiology is unclear, in code "label" and "account" are the same thing:

importprivkey function (src/rpcdump.cpp):

pwalletMain-&gt;SetAddressBookName(vchAddress, strLabel);


from getnewaddress function (src/rpcwallet.cpp):

pwalletMain-&gt;SetAddressBookName(keyID, strAccount);