Smooth is related to Silk. Silk is related to East. Northeast is derived from East. Northeast is similar to Southeast. 
Vaccine is related to Shot. Shot is related to Drive. Drive is related to Nail. 
Smooth <--RelatedTo--> Silk <--RelatedTo--> East <--DerivedFrom-- Northeast <--SimilarTo--> Southeast 
Vaccine <--RelatedTo--> Shot <--RelatedTo--> Drive <--RelatedTo--> Nail 