Army can be used for Protection. Army is related to Ceremony. Ceremony is related to Custom. 
Tax is a synonym of Contribution. Contribution is a type of Attempt. Attempt is related to Make. 
Protection <--UsedFor-- Army <--RelatedTo--> Ceremony <--RelatedTo--> Custom 
Tax <--Synonym--> Contribution --IsA--> Attempt <--RelatedTo--> Make 