Main is related to Parade. Parade is a synonym of Exhibit. Exhibit is a synonym of Depict. Depict is a synonym of Point. 
Supply is related to Soap. Soap is the opposite of Dirt. Dirt is related to Road. Road is related to Upper. 
Main <--RelatedTo--> Parade <--Synonym--> Exhibit <--Synonym--> Depict <--Synonym--> Point 
Supply <--RelatedTo--> Soap <--Antonym--> Dirt <--RelatedTo--> Road <--RelatedTo--> Upper 