Synonyms for Affluent (same or very similar meaning)
WordNet sense 1 (a branch that flows into the main stream):
confluent, feeder, tributaryWordNet sense 2 (having an abundant supply of money or possessions of value):
flush, loaded, moneyed, wealthyWordNet sense 3 (possessing material wealth):
richFrom the ODE community, based on WordNetadd/edit