Open is the opposite of Shut. Shut is a synonym of Alley. Alley is related to Lane. you are likely to find Lane in/at/on City. 
Mobile is related to Car. Car is related to Put. Put is related to Belong. Belong is related to Base. 
Open <--Antonym--> Shut <--Synonym--> Alley <--RelatedTo--> Lane --AtLocation--> City 
Mobile <--RelatedTo--> Car <--RelatedTo--> Put <--RelatedTo--> Belong <--RelatedTo--> Base 