what is fiefdom nepotism cronyies oxymoron?

Answer 1

fiefdom:
#1: the domain controlled by a feudal lord
#2: an organization that is controlled by a dominat person or group

nepotism:
Favoritism shown or patronage granted to relatives, as in business. [French népotisme, from Italian nepotismo, from nepote, nephew, from Latin nepōs, nepōt-.]

crony (plural: cronies)
A longtime close friend or companion. [Possibly from Greek khronios, long lasting, from khronos, time.]

oxymoron
A rhetorical figure in which incongruous or contradictory terms are combined, as in a deafening silence and a mournful optimist. [Greek oxumōron, from neuter of oxumōros, pointedly foolish : oxus, sharp + mōros, foolish, dull.]