Nouns

(n)affluentan affluent person; a person who is financially well off“the so-called emerging affluents”
(n)feeder, tributary, confluent, affluenta branch that flows into the main stream

Adjectives

(s)affluent, flush, loaded, moneyed, wealthy, substantialhaving an abundant supply of money or possessions of value“an affluent banker”, “a speculator flush with cash”, “not merely rich but loaded”, “moneyed aristocrats”, “wealthy corporations”, “a substantial family”