From Schott's Original Miscellany:

Systems of Government:

rule by                          is called
all equally....................pantisocracy
armed forces...................militocracy
bishops........................exarchy
civil servants.................bureaucracy
clerics........................ecclesiarchy
elderly........................gerontocracy
eldest male....................patriarchy
judges.........................kritarchy
men............................andocracy
nobility.......................aristocracy
one individual.................autocracy
the people.....................democracy
the poor.......................ptochocracy
pope...........................paparchy
propertied class...............timocracy
religious law..................theocracy
saints.........................hagiarchy
slaves.........................doulocracy
a small cabal..................oligarchy
technical experts..............technocracy
wealthy........................plutocracy
women..........................gynarchy
the worst possible.............kakistocracy