Alliance is related to Affair. Affair is a synonym of Thing. Thing is related to Toy. Toy is related to Bat. 
Weaken is a different concept from Assure. Assure is a different concept from Trouble. Trouble is related to Difficulty. 
Alliance <--RelatedTo--> Affair <--Synonym--> Thing <--RelatedTo--> Toy <--RelatedTo--> Bat 
Weaken <--DistinctFrom--> Assure <--DistinctFrom--> Trouble <--RelatedTo--> Difficulty 