The word ending in “ism” is another word for this kind of compound government are Federalism.
The term “government” refers to a legal authority or system that is controlled and directed by an office, public sector, country, or state. The government imposed the law. The most common functions of the government are leadership, controlling, maintaining order, commanding, providing public services, and national security.
Federalism is a concept that refers to both regional and national governments. A different name for this type of compound governance is ism. Federalism combines a general government with local governments to form a mixed or compound form of government. Two separate governments receive a portion of the power that the people have given up.
As a result, the word ending in “ism” is another word for this kind of compound government are Federalism.
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I believe it's Red Sea, but I'm not 100% sure.