I need another word for a government?

writing a novel....no judgement please. i just need another word for a ruling government. examples of ones in shows Federation Galactic Republic Interstellar Alliance Systems Commonwealth i just need something to call this government. it is an oppressive tyrannical government, but doesn't see itself that way. show more writing a novel....no judgement please. i just need another word for a ruling government.
examples of ones in shows
Federation
Galactic Republic
Interstellar Alliance
Systems Commonwealth

i just need something to call this government. it is an oppressive tyrannical government, but doesn't see itself that way.
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