The term is a subversive.
An absolute government would be totalitarianism, or a dictatorship.
The word plutocracy means a government or society ruled by the rich.
This was the original meaning of monarchy, which is now generally reserved for hereditary kings, queens, and emperors.
There is no one-word substitute in English for "son-in-law."
The word you want is florist.
Sportsmanship is a word substitute for spirit of game
The word metalworking is one word.
One possible substitute for "their" is "his" or "her" depending on the gender of the person/people being referred to. Another substitute can be "its" when referring to a non-human object or entity.
eat, use
The word that works is idiot.
Elevate
Traditionalist