Endorse is a synonym of Back. Back is related to Experience. Experience is a synonym of Endure. Endure is a synonym of Last. 
Gravity is a type of Attraction. Attraction is a type of Force. Patrol is a type of Force. 
Endorse <--Synonym--> Back <--RelatedTo--> Experience <--Synonym--> Endure <--Synonym--> Last 
Gravity --IsA--> Attraction --IsA--> Force <--IsA-- Patrol 