WordNet (r) 3.0 (2006):

gross national product
    n 1: former measure of the United States economy; the total
         market value of goods and services produced by all citizens
         and capital during a given period (usually 1 yr) [syn:
         gross national product, GNP]

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "gross national product":
   GNP, barter economy, capitalistic economy, collectivized economy,
   consumer economy, diversified economy, economic system, economy,
   farm economy, free-enterprise economy, handicraft economy,
   hot economy, industrial economy, laissez-faire, local economy,
   mercantile economy, national economy, overheated economy,
   planned economy, private-enterprise economy, rural economy,
   socialistic economy, sound economy, town economy, urban economy,
   village economy, war economy, world economy