Road is related to Stop. Stop is a synonym of Block. Block is a synonym of Cluster. 
Republican is similar to Green. Green is related to Grape. Grape is related to Bunch. Bunch is related to Whole. 
Road <--RelatedTo--> Stop <--Synonym--> Block <--Synonym--> Cluster 
Republican <--SimilarTo--> Green <--RelatedTo--> Grape <--RelatedTo--> Bunch <--RelatedTo--> Whole 