Weather is related to Natural. Natural is related to Native. Native is related to Country. Country is related to Independent. 
Republic is a different concept from State. Freedom is a type of State. Freedom is the opposite of Jail. 
Weather <--RelatedTo--> Natural <--RelatedTo--> Native <--RelatedTo--> Country <--RelatedTo--> Independent 
Republic <--DistinctFrom--> State <--IsA-- Freedom <--Antonym--> Jail 