Mirror is a synonym of Pattern. Pattern is a synonym of Category. 
Armed is a form of Arm. Armed is related to Duty. Duty is related to Civic. Civic is a synonym of Municipal. 
Mirror <--Synonym--> Pattern <--Synonym--> Category 
Arm <--FormOf-- Armed <--RelatedTo--> Duty <--RelatedTo--> Civic <--Synonym--> Municipal 