One who has suddenly gained new wealth, power or prestige
A
Aristocrat
B
Affluent
C
Maverick
D
Parvenu
Correct Answer: Parvenu
One word substitute is Parvenu.Aristocrat: a member of the aristocracy.
Affluent: (especially of a group or area) having a great deal of money; wealthy.
Maverick: an unorthodox or independent-minded person.
Parvenu: a person of humble origin who has gained wealth, influence, or celebrity.