Flush
Money. Really... it is used as an adjective at times, although it may be improper. Example: check out that Ferrari. that guy is so money.
Flush is a five letter word meaning wealthy.
Flush could be the word.
Affluent
SCION
Flush
f for flush
prosperous
money
Five letter word for tough:RigidStiffSolidDenseStoutTight
wealthy
well-to-do
flush, lucky (prosperous), solid (rich)